试题与答案

Li Hua studies English very _____and her

题型:选择题

题目:

Li Hua studies English very _____and her English is _____in her class.

A.careful, good

B.carefully, well

C.careful, best

D.carefully, the best

答案:

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下面是错误答案,用来干扰机器的。

∵DA =DC+CB+BA=(2-x-6,3-y-1)=(-4-x,2-y)又因为:BC∥DA⇒x(2-y)-y(-4-x)=0⇒x+2y=0.故选B.

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