正确答案: A

many thousand times

题目：High-speed rotating in a centrifugal purifier can produce a force （） larger than the force of gravity.

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学习资料的答案和解析：

[单选题]在偶然故障期内，故障是否发生，是（）。

无法预测

[单选题]目前钢质海船建造时安装的轴系广泛采用（）。

合理校中

[单选题]当铁梨木艉轴承的轴承间隙和铁梨木板条厚度均不合标准时，应采用（）修理。

C．换下瓦

[单选题]铁梨木艉轴承的缺点是（）和（）等。

价格贵/不耐磨

[单选题]Increasing the temperature of a fuel will reduce its （）.

viscosity

[单选题]The four strokes are called suction, compression, expansion and exhaust, but only （） stroke provides the power to drive the ship.

expansion

[单选题]The main factor which determines the output of each cylinder is （）

the cylinder bore

[单选题]One method of constructing large marine diesel engines and reducing the total engine frame weight is through （）.

welding plates to form sections for assembly