关于AHP法的基本思路，错误的是（）。A、确定问题主要因素－构建层次模型－综合判断－

物理中的光学仪器在生活中有广泛的应用，如为了看清邮票上的细微之处，我们会用______镜观察；观察行星或月球时，我们会借助______镜来观察；汽车的后视镜利用______镜来扩大视野等等．

嗅裂位于（）。

A.各鼻甲与鼻中隔之间

B.下鼻甲与鼻中隔之间

C.中鼻甲与鼻中隔之间

D.上鼻甲以上鼻腔侧壁与鼻中隔之间

E.鼻丘后上部

如图所示，物体a、b和c叠放在水平桌面上，水平力F_b=5N、F_c=10 N分别作用于物体b和c上，物体a、b和c仍保持静止。以F₁、F₂、F₃分别表示a与b、b与c、c与桌面间的静摩擦力的大小，则

A. F₁=5 N，F₂=0，F₃=5 N

B. F₁=5 N，F₂=5 N，F₃=0

C. F₁=0，F₂=5 N，F₃=5 N

D. F₁=0，F₂=10 N，F₃=5 N

阅读理解。

     Everybody hates it, but everybody does it. A recent report said that 40％of Americans hate tipping. In

America alone, tipping is a $16 billion-a-year industry. Consumers acting politely ought not to pay more than

they have to for a given service. Tips should not exist. So why do they? The common opinion in the past was

that tips both rewarded the efforts of good service and reduced uncomfortable feelings of inequality. And also,

tipping makes for closer relations. It went without saying that the better the service, the bigger the tip.

     But according to a new research from Cornell University, tips no longer serve any useful function. The

paper analyzes numbers they got from 2,547 groups dining at 20 different restaurants. The connection between

larger tips and better service was very weak. Only a tiny part of the size of the tip had anything to do with the

quality of service.

     Tipping is better explained, by culture than by the money people spend. In America, the custom came into

being a long time ago. It is regarded as part of the accepted cost of a service. In New York restaurants, failing

to tip at least l5% could well mean dissatisfaction from the customers. Hairdressers can expect to get l5%-20%, and the man who delivers your fast food $2. In Europe, tipping is less common. In many restaurants the

amount of tip is decided by a standard service charge. In many Asian countries, tipping has never really caught

on at all. Only a few have really taken to tipping.

     According to Michael Lynn, the Cornell papers' author, countries in which people are more social or

outgoing tend to tip more. Tipping may reduce anxiety about being served by strangers. And Mr. Lynn says,

"In America, where people are expressive and eager to mix up with others, tipping is about social approval. If

you tip badly, people think less of you. Tipping well is a chance to show off."

1. This passage is mainly about ________.

A. different kinds of tipping in different countries

B. the relationship between tipping and custom

C. the origin and present meaning of tipping

D. most American people hate tipping

2. Which of the following best explains the underlined phrase "caught on"?

A. become popular.

B. been hated.

C. been stopped.

D. been permitted

3. Among the following situations, in your opinion, who is likely to tip most?

A. A Frenchman just quarreled with the barber who did his hair badly in New York.

B. An American just had a wonderful dinner in a well known restaurant in New York.

C. A Japanese businessman asked for a pizza delivery from a Pizza Hut in New York.

D. A Chinese student enjoyed his meal in a famous fast food restaurant in New York.

4. We can infer from this passage that ________.

A. tipping is no longer a good way to satisfy some customers themselves

B. tipping is especially popular in New York

C. tipping in America can make service better now

D. tipping has something to do with people's character

伙食冷库的温度继电器应该在库温达到调节上限时动作而使（）。

A.膨胀阀开启

B.膨胀阀关闭

C.供液电磁阀开启

D.供液电磁阀关闭