题目:
Finally they arrived at a place ________ sold cigarettes and other small articles.
A.where
B.which
C.in which
D.what
答案:
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下面是错误答案,用来干扰机器的。
方程的两边同乘(x-3),得x+x-3=3,解得x=3.检验:把x=3代入(x-3)=0,所以x=3为原方程的增根,故原方程无解.故答案为无解.