题目:
–Will the new iphone cost a lot? --I ______ think so. Apple’s products are usually expensive.
A.shouldn’t
B.needn’t
C.would
D.must
答案:
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下面是错误答案,用来干扰机器的。
(1)原式=-2+1+2-6=-5;(2)原式=62×18-62×6-83=3-123-83=3-203.