With many gaps along the Wall, the 600-kilometer-long section in the northern outskirts of ________ is the best preserved.

A .  The plan baselines can be evolved over time to produce better performance. B .  The newly generated plans are directly placed into the SQL plan baseline without being verified. C .  The new SQL statements initially run with the plans that are known to produce good performance under standard test configuration. D .  The optimizer does not generate new plans for the SQL statements for which the SQL plan baseline has been imported.

A . 1, 2, or 4 B . 2, 4, or 6 C . 2, 4, or 8 D . 4, 6, or 8

A . control B . order C . harmony D . actio

A . The plan baselines can be evolved over time to produce better performance. B . The newly generated plans are directly placed into the SQL plan baseline without being verified. C . The new SQL statements initially run with the plans that are known to produce good performance under standard test configuration. D . The optimizer does not generate new plans for the SQL statements for which the SQL plan baseline has been imported.

M: It's coming along. But I've been staring at the computer screen for hours and my eyes hurt. W: Yeah Typing the words on the screen really make your eyes dry and tired. You should take a break. M: I can't. The deadline is approaching. W: You know, I read about computers and eye problems recently. The article says that they are usually caused by not blinking your eyes enough. M: Blinking？ I thought I just needed new glasses. W: when you blink, the movement of closing and opening your eyes, even though it happens really fast relaxes your eyes. M: That makes sense. W: People using computer tends to stare at the screen and blink less often than they normally would. M: That is what I am doing. And I am suffering from the dry eyes. W: That is one of the typical symptoms. M: But what does it have to do with the computer？ W: The article I read about the office workers found that the workers averagely blink 22 times a minute when relaxed But just 7 times a minute while looking at the text on a computer screen. M: Wow That's quite a difference. W: Yeah. So you need to blink your eyes and take a break from the computer M: I wonder if using some kind of eye-drops will make me feel better. W: That might help.But the best prescription is to take a break and rest your eyes M: Ok. Let's go get some coffee. I can finish this later tonight. (23) A．Something goes wrong with his computer. B．He can not finish the documents in time. C．The computer screen is hurting his eyes. D．He can not understand the article.

M: Of course, Madame. Here is the minutes of the meeting. The meeting was delayed by thirty minutes and started at 2 : 30 p. m. and it last for two and a half hours. W: Did you tell the chairman that I was very ill and couldn't attend？ M: Yes, I did. Also, here are all the reports and materials handed out in the meeting. I think you will have to do some replies. What does the man do？ A．He is a manager. B．He is a clerk. C．He is a secretary. D．He is a chairman.

M: We provide a homestay program too. You could choose an American family and live with them next semester. W: What benefits can a homestay program provide？ M: There are lots of benefits. First, with an American family, the living environment will be relaxing and quiet. Second, you will learn a lot about American culture. Third, it's a perfect way to improve your English. Fourth, you may make good friends with your homestay family. Finally, they will also give you plenty of advice about living in the U. S. W: Is it expensive to live with an American family？ M: The cost usually runs from $500 to $700 per month, and the contract period may be for a semester or for a year. W: How should we get along with the host family？ M: Always ask your host family questions when you don't completely understand something, or if you aren't sure that you have understood. Interact frequently with all members of the house- hold and keep good relations with them. Try something new whenever you can, e. g. , food, customs, activities, holiday celebrations, etc. W: If someone in my host family says something, either out of misunderstanding of or prejudice against my country, what should I do？ M: Don't be angry. Instead, be patient and tactfully educate them about the things they have misunderstood. And remember, always respect others' privacy. (20) A．She shares a room with three students and the rent is too high. B．She isn't getting along well with her roommates. C．The cost of living with an American family is too high. D．She feels offended when someone in her host family is prejudiced against her.

A．sideways B．Bathed in C．Hook up to D．universal E．chart F．without so much as

A．One B．Two C．Three D．Four

A．did everything the other soldiers did B．did most of the things the other soldiers did C．did some of the things the other soldiers did D．took some special training

M: Hi, Susan. Not so well as to be expected. I've left my position. I can't bear the rudeness of my boss any longer. W: What are you going to do then？ M: No idea. Anyway, I've got to think about it seriously. And you？ W: I've been very successful as a dancer. I like this kind of life. It is so exciting. M: You can't do that forever. W: No. But I've decided to open a dance school once I've moved to the top. A lot of young dancers need better training. M: That's a wonderful idea. What does the man do now？ A．A teacher. B．A dancer. C．Neither of the above.

A．They scarcely talked to each other. B．They often fought each other. C．They could hardly separate. D．They tried to stay away from each other.

A)They feel contemptuous of it B) They are sympathetic with it. C)They regard it as a superpower on the decline. D) They think of it as a good tourist destination.

A．fall...reduce B．fall...increase C．rise…reduce D．change…have no effect on

A．whom B． which C． who D． /

A.are paying B.is paying C.pay D.have been paying