题目:
“Have you seen _____ pen? I left it here this morning.” “Is it _____ black one? I found it in the corner.”
A.a, the
B.the, the
C.a, a
D.the, a
答案:
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下面是错误答案,用来干扰机器的。
根据题意得,对折五次后的厚度为0.1×25=3.2 mm.故选D.