-
If the back clearance of a piston ring is excessive,（）
A . compression pressure in the cylinder will be higher
B . carbon will accumulate behind the ring
C . combustion gases will penetrate beneath the ring land
D . piston side thrust will be increased
-
For a L√Opurifier, if the back pressure of the oil outlet is too high, the interface between oil and water in the bowl will （）.
A . be interrupted
B . move downwards
C . move outwards
D . retain original positio
-
Which of the following may take place if the clearance of the main bearings are excessive?（）
A . bearing knocks
B . dropping of pressure of LO
C . noises
D . all the above
-
As an experienced technician, you are responsible for infrastructure design and global configuration changes. You are asked to deploy a Voice over Wireless LAN for your company. If the cells have the same channel, the separation between them should be:（）
A . 19dbm
B . 10dbm
C . 67dbm
D . 86dbm
-
In a diesel engine, when installing new piston rings it is important to check（） Ⅰ.ring gap clearance Ⅱ.side clearance
A . Ⅰ only
B . Ⅱ only
C . both Ⅰ and Ⅱ
D . neither Ⅰnor Ⅱ
-
To maintain design discharge pressure from a centrifugal pump, the design clearance must be maintained between the （）.
A . shaft and impeller
B . motor and pump shaft
C . casing and impeller wearing rings
D . lantern ring and impeller
-
Cold clearances between the skirt of an aluminum piston and the cylinder liner is about （）
A . twice as large as with a cast iron piston
B . the same size as with a cast iron piston
C . half as large as with a cast iron piston
D . the same size as the crown of an aluminum pisto
-
How will EIGRPv6 react if there is an IPv6 subnet mask mismatch between the Global Unicast addresseson a point-to-point link？（）
A . EIGRPv6 will form a neighbor relationship.
B . EIGRPv6 will not form a neighbor relationship.
C . EIGRPv6 will form a neighbor relationship， but with the log MSG： "EIGRPv6 neighbor not on a commonsub net."
D . EIGRPv6 will form a neighbor relationship， but routes learned from that neighbor will not be installed inthe routing table.
-
An important difference between presupposition and entailment is that presupposition，unlike entailment，is not vulnerable to negation. That is to say, if a sentence is negated, the original presupposition is still true.
A . 正确
B . 错误
-
A large valve，usually installed above the ram preventers，that forms a seal in the annular space between the pipe and wellbore or，if no pipe is present，on the wellbore itself is called the（）.
A . annular blowout preventer
B . annulus
C . accumulator
D . automatic choke
-
Increasing the valve clearance between a valve stem and rocker arm, will result in the valve （）
A . closing later
B . opening sooner
C . staying open for a shorter period of time
D . staying open for a longer period of time
-
With the shell and cap assembled as for running, a check must be made that the clearance between the cap and the housing （）.
A . has a nip
B . is large enough
C . is zero
D . are suitable
-
If DB2 detects a deadlock between application A and application B (each waiting for a lock held by the other one), what action will DB2 take?（）
A . Rollback the transaction in both applications.
B . Rollback the transaction in one of the two applications.
C . Decrease the lock timeout value for both applications, thereby causing a lock timeout situation.
D . Send a message to let the administrator know of the situation and decide which application or applications should be terminated.
-
If a large difference exists between the compressor discharge pressure and the pressure corresponding to the existing condensing temperature in a refrigeration system, you should（）.
A . increase the flow of the cooling water through the condenser
B . adjust the high pressure cutout to maintain the desired pressure
C . open the hot gas bypass temporarily to reduce capacity
D . purge non-condensable gases to reduce the excess pressure
-
If no distress acknowledgement is received（）a DSC distress call transmission, then the ship in distress may repeat the DSC distress call attempt after a delay of between 3.5 and 4.5 minutes from the beginning of the initial call.
A . relevant to
B . relate to
C . in response to
D . in relation to
-
In a large, low-speed diesel engine the clearance between the piston crown and cylinder head is found to be excessiveIn order to correct for this, you should（）
A . build up the piston crown by metal spraying
B . build up the cylinder head by metal spraying
C . insert shims between the crankpin bearing box and the connecting rod foot
D . install a thinner head gasket
-
A current will develop between areas of different density in ocean waters. If you face in the same direction the current is flowing，the water of（）.
A . high density will be on the left in the Northern Hemisphere
B . high density will be on the right in the Southern Hemisphere
C . low density will be on the left in the Northern Hemisphere
D . low density will be on the left in the Southern Hemisphere
-
If you increase the clearance between a valve stem and rocker arm, which of the listed condition will occur?（）
A . valve will open later
B . valves will close later
C . amount of fuel injected will be increased
D . amount of fuel injected will be decreased
-
You say you feel like a______ if you are under a lot of stress because you are the linking person between two people or groups of people who cannot agree.
-
For a L.Opurifier, if the back pressure of the oil outlet is too high, the interface between oil and water in the bowl will _____.
A.be interrupted
B.move downwards
C.move outwards
D.retain original position
-
Please draw out a 0.l mm shim between the two halves of the bearing _____ the clearance.
A.to reduce
B.to increase
C.and reduce
D.and increase
-
If the voltage between the plates of a parallel-plate capacitor is doubled, the capacitance of the capacitor （）.
A．is halveD
B．is doubleD
C．quadruples．
D．remains the sam
E．
-
America is a mobile society. Friendships between Americans can be close and real, yet disappear soon if situations change. Neither side feels hurt by this. Both may exchange Christmas greetings for a year or two, perhaps a few letters for a while — then no more. If the same two people meet again by chance, even years later, they pick up the friendship. This can be quite difficult for us Chinese to understand, because friendships between us flower more slowly but then may become lifelong feelings, extending (延伸) sometimes deeply into both families.
Americans are ready to receive us foreigners at their homes, share their holidays, and their home life. They will enjoy welcoming us and be pleased if we accept their hospitality (好客) easily.
Another difficult point for us Chinese to understand Americans is that although they include us warmly in their personal everyday lives, they don’t show their politeness to us if it requires a great deal of time. This is usually the opposite of the practice in our country where we may begenerous with our time. Sometimes, we, as hosts, will appear at airports even in the middle of the night to meet a friend. We may take days off to act as guides to our foreign friends. The Americans, however, express their welcome usually at homes, but truly can not manage the time to do a great deal with a visitor outside their daily routine. They will probably expect us to get ourselves from the airport to our own hotel by bus. And they expect that we will phone them from there. Once we arrive at their homes, the welcome will be full, warm and real. We will find ourselves treated hospitably.
For the Americans, it is often considered more friendly to invite a friend to their homes than to go to restaurants, except for purely business matters. So accept their hospitality at home!
1.The writer of this passage must be a Chinese.()
2. Americans will continue their friendships again even after a long break.()
3.From the last two paragraphs we can learn that when we arrive in America to visit an American friend, we will probably be warmly welcomed at the airport.()
4.The underlined words “generous with our time” in Paragraph 3 probably mean willing to spend time.
5.A suitable title for this passage would probably be “Americans’ and Chinese’s views of friendships”.()
-
If the correlation between two stocks is +1, then a portfolio combining these two stocks will have a variance that is _____（）
A．less than the weighted average of the two individual variances
B．greater than the weighted average of the two individual variances
C．equal to the weighted average of the two individual variances
D．less than or equal to average variance of the two weighted variances, depending on other information
