我国工业用标准筛号常用"目"表示，"目"系指（） A.每厘米长度上筛孔数目 B.每市

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       December 21st is Becky's birthday. When she gets home after school, she sees her parents sitting at

the table. On the table there is a birthday cake with fourteen candles. They say to her, "Happy birthday,

dear! We have a present for you, Becky. Go and look for it in your bedroom."

       Becky runs quickly to her room. On her bed she sees a red box. She thinks that her present must be

in the box. She opens it. There is nothing but a card in it. The girl takes it out and reads, "Dear Becky, I'm your present. My first three letters are the same as in the word 'come'. My last two letters are the same as

in the word 'water'. My middle three letters are in the word 'put'. What am I?"

       Becky thinks hard and soon smiles. Then she goes to the living room and shouts, "Aha, I know what

present it is. Thank you very much, Mum and Dad!But where is it?" Her mother answers, "Look at the

back of the card." Becky turns it over and reads, "Come and look for me in the study."

       Becky hurries to the study. There on the desk she finds her present. What is it? Do you know?

1. How old is Becky? ____.

A. She is eleven years old        

B. She is fourteen years old

C. She is twelve years old        

D. She is thirteen years old

2. Is Becky a student? ____.

A. Yes, she is    

B. No, she isn't    

C. Yes, she isn't    

D. No, she is

3. What's the meaning of the word "study" in the third paragraph?____.

A. 书房    

B. 学习    

C. 研究    

D. 起居室

4. What's the present given by her parents? ____.

A. A box      

B. A bike        

C. Candles        

D. A computer

5. Where is the present? ____.

A. In the living room    

B. In the bedroom  

C. In the study  

D. In the box

世界上规模最大、保存最完好的宫殿建筑群是：

A．北京故宫

B．西安兵马俑

C．北京颐和园

D．南京明孝陵

摩擦减振器的行程为（）。

A、100mm

B、113mm

C、126mm

D、140mm

自控系统开环放大倍数叙述错误的是（）。

A.越大越好

B.越小越好

C.在保证系统动态特性前提下越大越好

D.恒等于1