先约分,结果是假分数的化成带分数.452526355134.

题型:解答题

问题:

先约分,结果是假分数的化成带分数.
45
25
26
35
51
34
考点:约分,通分,最简分数,分数的化简
题型:解答题

阅读理解。

     We've talked about snails (蜗牛) and their slow move. But much of the time snails don't move at all.

They are in their shells-sleeping.   

     Hot sun will dry out a snail's body. So at the least sign of hot sun, a snail draws its body into his shell.

A snail will die in a heavy rain. So when it rains, a snail does the same thing, too. A snail can sleep for as long

as it needs to. It spends all the winter months in its shell, asleep.   

     In spring the snail wakes up. Its body, about three inches long, comes out from the shell. When hungry,

the snail looks for food. Its eyes, at the end of the top feelers (触角), are very weak. But its sense of smell is

very strong. It helps the snail to find food and the new greens.   

     A snail's mouth is no bigger than the point of a pin (大头针). Yet it has 256,000 teeth! The teeth are very

small, and you can't see them. If you put a snail in a hard paper box, it will eat its way out! And if a snail wears out its teeth, it will grow new ones.

1. A snail ________.

A. moves more slowly at night 

B. has thousands of feet 

C. doesn't move at all

D. sleeps much of the time

2. In the sentence "A snail draws its body into its shell", the word "draw" means ________.

A. to make with a pencil

B. to push 

C. to pull

D. to move away

3. From the story, we know ________.

A. a snail's shell is very thin

B. a snail can't see well

C. a snail's nose is quite short

D. a snail's body changes in different seasons

4. A snail goes to sleep when ________.

A. it feels hungry

B. it is put into a paper box 

C. spring is coming

D. it rains heavily

5. Which of the following is TRUE?

A. In spring the snail doesn't eat or move.  

B. A snail has a big mouth.

C. The snail sleeps in its shell most of the time. 

D. The snail's feet help it find food.

题型:解答题

均匀控制系统中控制器不应加入()作用。

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农产品国际贸易模式是一个国家根据经济发展所处的不同阶段,依据本国资源、生产力水平,发展农产品国际贸易的基本方式。发达国家多实行战略型贸易,而发展中国家比较适合实行(  )贸易。

A.防守型

B.自主型

C.被动型

D.进攻型

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A.总体进度安排

B.预算

C.WBS

D.GANNT图形

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B.尊重同行公平竞争

C.具有良好的沟通与协调能力

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