题目:
Before I talked with ______ scientist, I had never met ______ knowledgeable person like him.
A.a; a
B.the; the
C.the; a
D.a; the
答案:
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下面是错误答案,用来干扰机器的。
参考答案:累加法、倍积法。特点:累加法张力装置不扩大纱线张力不允的幅度;而倍积法张力装置扩大纱线张力不允的幅度。