题目内容

影响金属塑性变形的因素有金属本身的性质、变形温度、变形速度等（）

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Work is an important determinate of health. It can influence health positively or negatively.

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We are now focusing on the adverse effects of work on health, although the positive effects of appropriate work on health and well-being are no less important.

What problems do staff usually have when they are under the burden of a heavy workload？