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问题 填空题
一筐水果，第一次卖出总个数的
2
5
又3个，第二次卖出余下的
1
3
又2个，还剩4个，这筐水果有共______个．
答案

设这筐水果共有x个，可得方程：

x-（

2
5
x+3）-[（x-
2
5
x-3）×
1
3
+2]=4

x-

2
5
x-3-[（
3
5
x-3）×
1
3
+2]=4，

3
5
x-3-
1
5
x+1-2=4，

2
5
x=8，

x=20．

答：这筐水果共有20个．

故答案为：20．

阅读理解

阅读理解

       This is a teacher's family. The father's name is Lake Smith. He's forty-four.  The  mother's name is

Kate Smith. She's forty-two. The Smiths have a son, Jim, and a daughter, Ann. Jim is fourteen, and

Ann is twelve. The son looks like his father, and the daughter looks like her mother. They are all in

No.4 Middle School here. But the Smiths are teachers; the son and daughter are students .

1. —What's Jim's father ?      

    —He is ________ .    

A. a worker                

B. a teacher      

C. a doctor                    

D. a driver

2. Ann's mother's name is ________ .   

A. Lake Smith                      

B. Kate Smith

C. Jim Smith                        

D. Ann Smith

3. Jim looks like his ________ .       

A. father        

B. mother              

C. aunt          

D. uncle

4. —Are Jim and Ann in the same school ?

    —__________ .   

A. They are in the same school

B. They are in different schools

C. Yes , they are

D. No , they aren't

5. —Is Kate Smith a teacher ?

   —_________ .  

A. Yes , she is          

B. Yes , he is

C. No , she isn't              

D. No , he isn't
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单项选择题

触点块串联指令集中使用时，最多使用次数为（）次。

A.2

B.8

C.9

D.无数
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