题目内容

Fill in the blanks based on what you hear.1【填空题】As long as you are committed to your goals and you are ____about your dreams, you will ____accomplish them.2【填空题】To accomplish ____results in your life, you have to be 100 percent committed and you must be willing to ____your time and effort.3【填空题】There are three steps that you should follow to achieve success: ____, ____, ____.

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小能量多次冲击载荷下工作的零件,其使用寿命主要决定材料的()。

A. 强度
B. 硬度
C. 塑性
D. 冲击吸收力

作疲劳试验时,试样承受的载荷为()。

A. 拉伸载荷
B. 冲击载荷
C. 交变载荷
D. 扭转载荷

一般工程图样上常标注材料的( ),作为零件检验的验收的主要依据。

A. 强度
B. 硬度
C. 塑性
D. 冲击吸收力

所有金属在拉伸实验过程中都会产生“屈服”现象和“劲缩”现象。

A. 对
B. 错

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