7.车床夹具的工作位置应是工件被加工面的中心处于夹具的中心上。
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8.车床夹具设计时要考虑夹紧安全、可靠。
A. 对
B. 错
9.车床夹具的夹具体应设计成圆形,为保证安全,夹具上的各种元件不允许凸出圆盘轮廓之外。圆盘直径由车床的主要参数确定。
A. 对
B. 错
10. 夹具制造精度对夹具的加工精度没有影响。
A. 对
B. 错
“My boyfriend of nearly two years haddumpedme for an airheaded cheerleader.”In this sentence, the worddumpedmeans __________.
A. put something somewhere in a careless untidy way
B. got rid of something that you do not want
C. ended a relationship with someone
D. told someone all your problems and worries