问题 问答题 计算题

某火力发电厂运来一批原煤,车皮容量为50t,按国标规定要求采得煤样总质量为540kg,来煤最大标称粒度小于50mm,问这批煤有多少节车皮?

答案

参考答案:

由于来煤最大标称粒度小于50mm,因此子样的最小质量为2kg,又已知这批煤是原煤,每节车皮采取3个子样,故5402=270(个)车皮数为2703=90(节)

阅读理解

阅读理解。

     When Bill is very young, he loves pictures. His mother often draws some for him on old pieces of

paper. She is very bad at drawing, but Bill likes her pictures and always wants more. 

     Then, when he is a little older, Bill's mother gives him some pencils and a drawing book, and he

begins drawing pictures, too. But they are never good. When Bill is five years old, his mother gives him a

small blackboard and some chalk (粉笔). He likes those very much. One day he is trying to draw a

picture of his father on the blackboard. He draws lines (线条) and rubs (擦) them out, draws more and

rubs those out too for ten minutes, but when he looks at his picture, he is not happy.

      "Well," he says at last (最后) to his mother, "I'll put a tail (尾巴) on it and make it a monkey (猴子)."

1. Bill _____ when he is very young. 

A. often wants his mother to draw pictures for him 

B. loves watching TV very much 

C. likes old pieces of paper very much 

D. always wants his mother to buy pictures for him

2. When he is a little older, his mother gives him _____ and let him begin drawing pictures. 

A. some paper and ink (墨水)    

B. a book and some pens 

C. some pencils and a drawing book  

D. a blackboard and some old paper

3. How old is he when he is trying to draw a picture of his father on the blackboard? 

A. He is five months old.        

B. He is five years old. 

C. He is fifteen years old.        

D. He is four years old.

4. Bill wants to put a tail in the picture, so _____. 

A. it looks like a duck          

B. it looks like his father 

C. it looks like himself        

D. it looks like a monkey

5. Which of the following is RIGHT? 

A. Bill's mother is good at drawing. 

B. Bill isn't bad at drawing. 

C. One day Bill wants to draw a picture of a monkey. 

D. Bill isn't happy when he looks at his picture of his father.

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