判断题

液压系统故障诊断方便、容易。
正确
错误

答案：错误

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单项选择题

体育是创造社会精神财富的重要手段，为现代社会发展提供了大量有益的精神产品。

A.正确
B.错误

不定项选择

Chemical reaction with 100% atom utilization has two characteristics. The reactants could be fully utilized, and the resource could be most possibly used economically. The waste could be minimized.

A．正确
B．错误