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问题 单项选择题

1!+2!+3!+…+2010!的个位数是（）。

A．1

B．3

C．4

D．5

答案

参考答案：B

解析：

1!=1、2!=2、3!=6、4!=24、当n≥5时，n!的尾数为0。则原式各项的尾数之和是1+2+6+4+0=13，故所求的个位数是3。

完形填空

My name is Han Mei．Now I want to say something about my father．My father is a doctor. He works in a children’s hospital.I don’t know much about his work. I just know he is very busy every day．He works five days a week，from Monday to Friday，sometimes he works on Saturdays or Sundays．He gets up early in the morning．He cooks breakfast for my family．After breakfast he goes to work at ten past seven.He has lunch at his workplace．He comes back home at about half past six．My mother cooks dinner. After dinner my father does the washing．Then he goes out for a walk.Before he goes to bed，he often reads some newspapers or watches TV．He goes to sleep very late．

小题1:What does Han Mei’s father do?                                               

小题2:How many days does Han Mei’s father work a week?                              

小题3:Who cooks breakfast for the family?                                           

小题4:Where does Han Mei’s father have lunch?                                       

小题5:When does Han Mei’s father come back home?                                   
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多项选择题

在黏性土中流土常表现为土体的（）等现象，如深基坑开挖时的坑底隆起。

A.隆胀

B.位移

C.浮动

D.抖动

E.断裂
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