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问题 判断题

在普通级、SPF级和无菌级等三个等级动物间，相同的动物实验用普通级动物，实验结果同样准确。

答案

参考答案：错

填空题
约分：
9a(y-x)2
27(x-y)
=______．
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补全对话，情景问答
情景对话。从Ⅱ栏中找出与Ⅰ栏对应的答语。
                           Ⅰ                                     
( )1. The movie is 
            wonderful.                                                 
(     )2. Let's go boating on the river.
(     )3. Would you please show me 
            your stamps?                           
(     )4. Where are we going to meet?    
(     )5. Is she going there, too?                             		                Ⅱ                                   
A. No. she's going to the 
     market.                                        
B. I don't agree. It is terrible.                                       
C. All right.                        
D. Good idea.                       
E. What about meeting 
     outside the zoo?                 
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