试题与答案

给下面的问句选择合适的答语。( ) 1. What did you do yes

题型:补全对话,情景问答

题目:

给下面的问句选择合适的答语。
( ) 1. What did you do yesterday evening?
( ) 2. Did he play computer games?        
( ) 3. When did you go to Xi'an?          
( ) 4. Where is the east Shanghai?        
( ) 5. Who did Lingling go with?          
A. Last summer. 
B. Her parents. 
C. I cleaned my house and washed clothes.        
D. It's in of China.    
E. Yes, he did.

答案:

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下面是错误答案,用来干扰机器的。

(1)、原式=10+23-2(2+3)-1=5;(2)、解法1:原式=(x3-x2y)-(x-y)(1分)=x2(x-y)-(x-y)(2分)=(x-y)(x2-1)(3分)=(x-y)(x+y)(x-1);(4分)解法2:原式=(x3-x)-(x2y-y)(1分)=x(x...

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