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问题 选择题

1998的不同约数的个数是（　　）

A．20

B．16

C．14

D．12

答案

1998=2×33×37，

单个质因数组成的约数有：2、3、9、27、37，

有两个质因数的约数有：6、18、54、74、111、333、999，

有三个质因数组成的约数有：222、666、1998，

再加上约数1，共有16个约数，

故选B．

阅读理解

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根据材料内容选出最佳选项，并在答题卡上将该项涂黑。
小题1:Where are the teachers needed to teach?
A．In France．B．In Japan．C．In Germany．D．In England．
小题2:What is a must if the applicants want to be accepted?
A．Experience of teaching．
B．Experience of staying abroad．
C．Knowledge of practical computer．
D．Knowledge of the Japanese language．
小题3:Which of the following about the applicants' working conditions is NOT true?
A．They teach in very small classes．
B．They get well trained for their job．
C．They teach their native languages．
D．They have to find places to live in．
小题4:What is a possible way of applying for the job?
A．Visiting the website．                      
B．Sending letters to Japan．
C．Talking with the manager．                  
D．Handing in C．V．in September．
小题5:What do you think the reading is?
A．An advertisement．B．A report．C．A diary．D．A notice．
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问答题 简答题

何谓缓变流和急变流？在缓变流截面上，压强分布有何规律？
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