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问题 单项选择题

测量镗床振动的方法是在工作台上固定一千分表，使其测头触及（）的圆周表面上，脱开传动齿轮，在主柚不旋转的情况下开动电动机，此时千分表的摆动量应小于0．005mm。

A.主轴锥孔内

B.主轴锥孔内的标准检验心轴

C.镗杆

D.主轴

答案

参考答案：B

听力题

根据短文内容和所给汉语提示，写出短文空白处各单词的正确形式。每空限填一词。

At school many things happen to us. We may feel   66 （激动的）when we succeed in a school play. We may feel sorry if we lose an important   67 （比赛）. We want to keep the memory in our lives. How to keep memories? Our teacher, Mr. Smith, has taught us how to   68 （记住）things to make our own yearbook. A yearbook is a  69 （种） of book which is used to memory wonderful moments. It’s usually made at the end of year. Last  70 （十二月）, we began to make our yearbook.  71 (首先) we chose the persons that had done something   72 （特殊的）, then some   73  （学生） interviewed them, some   74 （写）down their stories, others took photos of them. Finally our teacher helped us to put the things   75（一起）. Then we had our first yearbook.

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问答题 简答题

节气门位置传感器有何功用？有几种类型？
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