正确答案: C

80%

题目：运动副磨合良好可使摩擦表面的实际接触面积增大，可达( )以上。

解析：C

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举一反三的答案和解析：

[单选题]If the coolant temperature of a closed cooling water system for a diesel enginegradually increases, the trouble usually is( ).

an excessive accumulation of scale in the heat exchanger

解析：解析：gradually：逐渐地;accumulation：累积;scale：结垢;thermostatic：恒温的;range：范围

[单选题]一般螺杆泵直径越大，其他条件不变，则容积效率( )。

越高

[单选题]The magnetic field is provided by electromagnets so arranged that adjacent poles have ___.

opposite polarity

[单选题]海上遇难获救后体力未恢复、正确的饮食方法：

流质饮食

[单选题]Before entering a fuel tank that has been cleaned, it should be checked with an oxygen indicator and a/an ____.

combustible gas indicator

[单选题]机损事故分为________。

船员责任事故和非船员责任事故