正确答案: A

In a simple vane pump, the rotor and cam ring are exactly concentric

题目：Which statement is NOT true?

解析：A

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举一反三的答案和解析：

[单选题]隔离空舱专门用于( )。Ⅰ.油舱与淡水的分隔;Ⅱ.货油舱与机舱的分隔;Ⅲ.货舱与货舱之间的分隔。

Ⅰ+Ⅱ

[单选题]当船舶由海水水域进入半淡水水域时( )。

艏吃水增加，艉吃水增加

[单选题]关于肌肉的说法错误的是（）

骨骼肌有营养骨的作用

[单选题]When deciding the composition of the engineering watch, which may include____ appropriately, many factors shall be taken into account.

qualified ratings

[单选题]如要船舶定速航行，驾驶台应向机舱重复一次“( )”车令。

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