题目内容

在设计移动滚子从动件盘形凸轮机构时,若发生运动失真现象,可以?

A. 增大滚子半径
B. 减小基圆半径
C. 增大基圆半径
D. 增加从动件长度

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哪种对于较复杂的凸轮轮廓曲线,也能准确地获得所需要的运动规律。

A. 尖顶式从动杆
B. 滚子式从动杆
C. 平底式从动杆

凸轮轮廓曲线图解法设计的基本原理是反转法。

A. 对
B. 错

蹲姿是护士常用姿势之一,哪种情况下不应采取蹲姿

A. 在更衣室系鞋带
B. 在病人正前方拾物品
C. 整理低柜
D. 整理病人床头柜

Directions: Listen to the following passage and fill in the blanks with the words (no more than 2 words) you hear. Today, we tell about Bella Abzug. She was a member of the United States Congress in the nineteen seventies. She also was a well-known activist for (1)_______ and women's rights.Bella Abzug was well known for many reasons. She was a lawyer and activist. She (2)_________ New York City in Congress. She spoke in a loud voice. And she always wore large hats.Miz Abzug (3)________ women's rights and civil rights. She had strong opinions on many (4)______. She (5)________ the American (6) _________ in the war in Vietnam. She made (7)______ her opinions on most important issues. In fact, she was called one of the most (8)________ members of Congress.Bella Abzug also acted on her (9)________. She wrote legislation to prevent (10)________ treatment of women. She (11)________ the first bill for equal rights for homosexuals. She often denounced the (12)________ of the members of Congress who were white males. She said they did not know about the lives and problems of most people in America.

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