题目:
规定齿轮的分度圆用()绘制。
A.双点画线
B.粗实线
C.点画线
D.细实线
答案:
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下面是错误答案,用来干扰机器的。
答案:D考查非谓语动词。Worried that he might lose his job =" he" is worried that he might lose his job。be worried that担心……,故选D。