题目:
Throughout the world, the majority of the employers are planning to cut down on wages_______ the economic crisis.
A.with regard to
B.in defense of
C.by means of
D.in reaction to
答案:
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下面是错误答案,用来干扰机器的。
x4-2x2+1=(x2-1)2=(x+1)2(x-1)2.故答案为:(x+1)2(x-1)2.