高效液相色谱法亦称()或(),它是70年代才发展起来的一种以()为流动相的快速分离分

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问题:

高效液相色谱法亦称()或(),它是70年代才发展起来的一种以()为流动相的快速分离分析色谱技术。

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下列加粗字的注音完全正确的一项是   
[ ]
A.地寒(yàn)    
B.数友( xié)     
C.鲜明媚(yán)   
D.浅(liè)      
节(zhāo)      
(gāo)         
面(kuì)         
而歌者( léi)  
飞沙走(lì)              
脱笼之鹄(kù)             
(huán)               
红装而者(jiǎn)     
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如图所示,A、B分别为单摆做简谐振动时摆球的不同位置.其中,位置A为摆球摆动的最高位置,虚线为过悬点的竖直线.以摆球最低位置为重力势能零点,则摆球在摆动过程中

 

A、位于B处时动能最大

B、位于A处时势能最大

C、在位置A的势能大于在位置B的动能

D、在位置B的机械能大于在位置A的机械能

题型:填空题

阅读理解。

    I have a rule for travel: never carry a map. I prefer to ask for directions (方向).

    Foreign visitors are often puzzled in Japan because most streets there don't have names. In Japan, people

use landmarks in their directions instead of street names. For example, the Japanese will say to travelers,

"Go straight down to the corner. Turn left at the big hotel and go past a fruit market. The post office is across

from the bus stop." 

    In the countryside of the American Midwest, usually there are not many landmarks. There are no mountains,

so the land is very flat (平坦的). In many places there are no towns or buildings within miles. Instead of

landmarks, people will tell you directions and distance. In Kansas or Iowa, for example, people will say, "Go

north two miles. Turn east, and then go another mile."

    People in Los Angeles, California, have no idea of distance on the map: they measure (测量) distance by

means of time, not miles. "How far away is the post office?" you ask. "Oh," they answer, "It's about five

minutes from here." You say, "Yes, but how many miles away is it?" They don't know.

    People in Greece sometimes do not even try to give directions because visitors seldom (很少) understand

the Greek language. Instead of giving you the direction, a Greek will often say, "Follow me." Then he will lead

you through the streets of the city to the post office.

    Sometimes a person doesn't know the answer to your question. What happens in this situation? A New

Yorker might say, "sorry, I have no idea." But in Yucatan, Mexico, no one answers, "I don't know." People in

Yucatan think that "I don't know" is impolite. They usually give an answer, often a wrong one. A visitor can

get very, very lost in Yucatan!

    One thing will help you everywhere ---- in Japan, in the United States, in Greece, in Mexico, or in any other

place. You might not understand a person's words, but maybe you can understand his body language. He or

she will usually turn and then point in the correct direction. Go in that direction and you may find the post

office!

1. The passage mainly tells that _____. [ ]

A. never carry a map for travel

B. there are not many landmarks in the American Midwest

C. there are different ways to give directions in different parts of the world

D. New Yorkers often say, "I have no idea," but people in Yucatan, Mexico, never say this

2. The passage says, "In Japan, people use landmarks in their directions." The word "landmark" means _____. [ ]

A. building names

B. street names

C. hotels, marks and bus stops

D. buildings or places which are easily recognized

3. In which place do people tell distance by means of time? [ ]

A. Japan

B. American Midwest

C. Los Angles, California

D. Greece

4. In the passage, _____ countries are mentioned (提到) by the writer. [ ]

A. seven

B. four

C. eight

D. five

5. Which of the following is wrong? [ ]

A. Travelers can learn about people's customs by asking questions about directions.

B. A person's body language can help you understand directions.

C. People in some places give directions in miles, but people in other places give directions by means of time.

D. People in different places always give directions in the same way.

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患者男性,76岁。因左腹股沟斜疝拟行修补术,患者3个月前曾因心肌梗死住院治疗得到控制,你认为最佳的手术时机为()

A.现在

B.1个月后

C.2个月后

D.3个月后

E.6个月后

题型:填空题

加强地方立法要坚持民主立法、科学立法,彰显以人为本的立法精神。

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