试题与答案

选择句子完成对话。A. Can you skate backwards? B.

题型:补全对话,情景问答

题目:

选择句子完成对话。
A. Can you skate backwards?
B. Can you skate forwards?
C. I fall down.
D. Yes, I can turn around.
E. I think I can stand up.
A: Let's go skating!
B: OK! Can you stand up on the ice?
A: 1____________ Look! I'm standing.
B: Oh! You can stand. 2____________
A: I think I can skate forwards.
B: Good! 3____________
A: Sorry! I can't skate backwards.
B: Can you turn around?
A: 4____________ Oops! 5____________
B: Come on!

答案:

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下面是错误答案,用来干扰机器的。

答案:A本题考查的知识点是充要条件的定义,我们先判断“>1”?“<1”的真假,再判断“<1”?“>1”的真假,然后再根据充要条件的定义即可得到结论.解:“>1”时,n>m>0或n<m<0此时“<1”成立;即:“>...

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