After a shaky start, the Martian flotilla that has arrived over the past few weeks is getting down to business. Two of the five craft in it seem to be working perfectly. Two are lost. And a fifth is sick, but undergoing treatment.
The most spectacular pictures so far have been provided by Mars Express, the European Space Agency's contribution to the fleet. On January 28th this reached its final working orbit (which takes it over both poles, and thus allows it to see the whole of Mars over the course of a few days as the planet revolves beneath it). It has, however, been sending back data since shortly after it arrived, and a few days ago its controllers released a series of beautiful photographs, including a stereo image of Valles Marineris, a huge canyon that may have been formed by flowing water.
The most scientifically significant result, though, has come from Opportunity, America's second Mars rover. One of Opportunity's cameras has photographed evidence of stratification in nearby rocks. Such stratification indicates that the rocks concerned are sedimentary. The layers could be repeated wind-blown deposits, or consist of ash from successive volcanic eruptions. But the terrestrial rocks they most resemble are ones that have formed under water.
The reason everyone is getting so excited is because there is a widespread assumption that any form. of life which might dwell on Mars would need liquid water to live—or, even if it could now subsist by extracting moisture from ice, would have needed liquid water to evolve to that stage. Mars has seen more probes launched towards it than all of the other planets put together precisely because of this hope that it might harbour life. So there is a lot riding on the answer—not least the funding of future missions.
Besides its scientific significance, the success of Opportunity has also helped to distract attention from the sudden refusal of Spirit, the first American rover to arrive on Mars, to talk to its controllers. This craft had tentatively, but successfully, nosed its way off its landing platform, and was about to drill its way into a nearby rock prior to doing a spot of chemical analysis, when it went silent.
However, the engineers at NASA, America's space agency, are nothing if not resourceful, and they have a good record of carrying out running repairs on spacecraft that are millions of kilometres away. In the case of Spirit, they think that one of the craft's memory chips has got cluttered up with files created on the journey to Mars. That caused another chip, which manages the first, to throw a wobbly and to keep rebooting the computer. They are currently testing this idea by loading a diagnostic program on to the computer. In addition, as a precaution, they have deleted excess files from the equivalent memory chip on Opportunity.
Spirit's spirits may thus revive. As to the failures, the Japanese abandoned their fly-by craft Nozomi in December, and the British team in charge of Beagle 2, which is presumed to have landed on December 25th but from which no signal has been received, also seems to have called it quits. Still, a 40460% success rate (depending on whether Spirit is brought back into commission) is not bad by the historical standards of missions to Mars. Now, the real science begins.
Mars Express is mentioned because______.
A.it has been sending data back to the Earth
B.it illustrates Europe's contribution to the project
C.it is the first craft to have ever landed on the Mars
D.it can help researchers see the whole of the Mars
时间:2023-08-10 12:25:27
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Failure to open the diesel engine test cocks after a long period of shutdown, prior to starting may result in ()
A . an air bound fuel system
B . damage to cylinder heads and pistons
C . excessive fuel injection
D . excessive air valve lift
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An application fails to start after a Technology Level upgrade. The application vendor recommends that two filesets upgraded as part of the new Technology Level be rejected. What is the recommended method for performing this task?()
A . Run instfix -u to reject the filesets.
B . Run installp -r to reject the filesets.
C . Run installp -u to uninstall the filesets.
D . Restore the system to previous state from the system backup.
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The system hangs at boot time after starting NFS services.What is the most likely cause?()
A . The action parameter of rcnfs in /etc/inittab is 'off' and the script called is not exiting.
B . The action parameter of rcnfs in /etc/inittab is 'wait' and the script called is not exiting.
C . The action parameter of rcnfs in /etc/inittab is 'once' and the script called is not exiting.
D . The action parameter of rcnfs in /etc/inittab is 'respawn' and the script called is not exiting.
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You have updated the modem driver on your Windows 2000 Professional computer. You restart your computer. Immediately after you log on, you receive a stop error. You need to start Windows 2000. What must you do? ()
A . Restart the computer in Safe Mode. Uninstall the modem driver.
B . Restart the computer by using the last known good configuration.
C . Restart the computer in Recovery Console. Replace the new Modem.inf file with the old modem.inf file.
D . Start the computer from the Windows 2000 startup floppy disks. Repair the registry.
E . Start the computer from the Windows 2000 startup floppy disks. Repair the system files.
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After applying a new ACL on a device, its CPU utilization rose significantly and many messages starting with "%SEC-6-IPACCESSLOG" appeared on the Syslog server. What can be done to resolve this situation?()
A . Increase memory allocation for ACLs.
B . Remove all entries from the ACL and use a single permit ip any any statement.
C . Remove the log keyword from each ACL entry.
D . Reboot the device after the ACL has been applied.
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Immediately after any diesel engine is started, the engineer should check the ()
A . crankcase pressure
B . lube oil pressure
C . saltwater pressure
D . exhaust temperature
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After the engine is warned, we should() the turning gear before starting up the engine.
A . take in
B . put in
C . take out
D . put u
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The back-chaining technique means the students repeat a sentence after the teacher, starting from the end part of the sentence and moving towards the beginning.()
A . 正确
B . 错误
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Be sure to make the engine turn by () before starting and after stopping .
A . steering gear
B . turning gear
C . steering wheel
D . turning cycle
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The volunteers started looking after other children()parents died of AIDS last year
A . whose
B . that
C . which
D . who
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After installing WebSphere Commerce,the WebSphere Application Server fails to start. Which log file will help determine if WebSphere Application Server was installed correctly?()
A . <WAS_installdir>\logs\log.txt
B . <WC_installdir>\logs\install_date_time.log
C . <WAS_installdir>\logs\<WC_instance_name>\SystemOut.log
D . <WC_installdir>\instances\<instance_name>\xml\<instance_name>.xml
E . <WAS_installdir>\logs\serverStatus.log
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The system hangs at boot time after starting NFS services. What is the most likely cause?()
A . The action parameter of rcnfs in /etc/inittab is ’off’ and the script called is not exiting.
B . The action parameter of rcnfs in /etc/inittab is ’wait’ and the script called is not exiting.
C . The action parameter of rcnfs in /etc/inittab is ’once’ and the script called is not exiting.
D . The action parameter of rcnfs in /etc/inittab is ’respawn’ and the script called is not exiting
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An application fails to start after a Technology Level upgrade. The application vendor recommends that two filesets upgraded as part of the new Technology Level be rejected. What is the recommended method for performing this task?()
A . Run instfix -u to reject the filesets.
B . Run installp -r to reject the filesets.
C . Run installp -u to uninstall the filesets.
D . Restore the system to previous state from the system backup.
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After the war, Schindler says good bye to the Jews from his factory and starts his fugitive life. How about Amon Göth after the war?
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I’m ( ) to go jogging after work. (Fill the blank with a proper word.)
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It was soon after the economic rcisis_________sales of e-business started to grow.
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After a slow start, the plan soon took ______and was accepted by all.
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听力原文:M: More than a colleague complains that I smell of garlic for a couple of days after we've been to the Italian restaurant.
W: Then, how about the Korean today?
Q: What can we infer from the conversation?
(17)
A.They'll go to the Italian restaurant.
B.They'll go to the Korean restaurant.
C.They decide not to eat garlic any more.
D.They'll invite the man's colleagues to have some Italian food.
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听力原文:M: Did you notice after almost ten years in the United States, Mr. Lee still speaks English with such a strong accent.
W: Yes, but he is proud of it. He says it is a part of his identity.
Q: What does the conversation tell us about Mr. Lee?
(17)
A.His English is still poor after ten years in America.
B.He doesn't mind speaking English with an accent.
C.He doesn't like the way Americans speak.
D.He speaks English as if he were a native speaker.
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【单选题】I’m ( ) to go jogging after work. (Fill the blank with a proper word.) 答案:going
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I’m ( ) to go jogging after work. (Fill the blank with a proper word.) 答案:going
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听力原文:M: It's the mildest day in this winter. Do you want to go for a bike ride after the class?
W: When could we start at the latest? Today's last class is an experiment class and it often runs late.
Q: What do we learn about the woman from the conversation?
(18)
A.She might be late for her experiment class.
B.She doesn't have a bike.
C.She might be delayed by her last class.
D.She might be late for her experiment class.
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听力原文:M: Honeybee Foods Corporation, engaged in fast food industry, has been developing rapidly and steadily in the Philippines these years, but few could imagine that it was started in 1975 as an ice cream parlor owned and run by the Chinese- Filipino Tan family. After the company President Tom Tan Caktiong (better known as TTC) realized that events triggered by the 1977 oil crisis would double the price of ice cream, Honeybee had diversified into sandwiches. The Tan's hamburger, made to a home-style. Philippine recipe, quickly became a customer favorite. A year later, the family incorporated as Honeybee Foods Corporation.
The company's name came from TTC'S vision of employees working happily and efficiently, like bees in a hive. Friendliness pervaded the organization and became one of the “Five Fs” that summed up Honeybee's philosophy. The others were flavorful food, a fun atmosphere, flexibility in catering to customer needs, and a focus on families (children flocked to the company's bee mascot whenever it appeared in public). The company's value proposition offered all of these to customers at an affordable price. The recipe of the local Filipino flavor and sound operation and management enabled the corporation to grow rapidly. Up to 1985, Honeybee had 28 chains in the Philippines.
The domestic business success of the corporation made President TTC get greatly interested in international expansion. Since 1985, Honeybee started seven chain stores respectively in Singapore, Taiwan, Brunei, and Indonesia. However, except for the four extremely successful chains in Brunei, the other three all failed in the end. The major causes for the business failure included lack of full exchange and communication among different divisions, some problems in the organizational structure, and too fast development of international business.
Honeybee had opened a large number of chains in a short period of time, but owing to limited management ability, many of these chains were unprofitable. The corporation should take the development step by step and make sure that each new chain was profitable. Only in this way could the corporation guarantee sustainable development.
&8226;Look at the notes about an enterprise.
&8226;Some information is missing.
&8226;You will hear part of a presentation by the International Manager of the company.
&8226;For each question, fill in the missing information in the numbered space, using one or two words.
&8226;You will hear the presentation twice.
Honeybee Foods Corporation
Honeybee started originally as (16) an ______ parlor
The company's name came from (17) TTC' s vision of employees working
like ______
Honeybee's philosophy (18) “______”
Up to 1985, Honeybee had (19) ______ chains in the Philippines
In its international expansion, the successful chains were in (20) ______
The chain store of Honeybee in Singapore was (21) ______
In the future Honeybee should (22) ______ step by step.
(16)
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听力原文:W: Jason worked as a secretary for three years. Then he became a newspaperman. After that he started writing novels.
M: I know. And he has been doing nothing else ever since.
What is the man's occupation now?
A.He's a secretary.
B.He's a novelist.
C.He's a newspaperman.