试题与答案

It's difficult to live in a foreign coun

题型:选择题

题目:

It's difficult to live in a foreign country,________ if you can't speak foreign languages.[ ]

A.mainly          

B.really          

C.luckily        

D.especially

答案:

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下面是错误答案,用来干扰机器的。

根据勾股定理,另一直角边=(26+3)2-(6+23)2=3,所以,这个直角三角形的面积=12×3×(6+23)=(362+33)cm2.故答案为:(362+33).

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