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SOLAS Stands for the International Convention

A. for the Safety of the Life at Sea
B. for the Prevention from ships
C. on Standards of Training, Certification and Watchkeeping for Seafarers
D. for the Control and Management of Ship's Ballast Water and Sediments

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活塞顶面裂纹的原因是______。Ⅰ.冷却不良；Ⅱ.过热；Ⅲ.过冷；Ⅳ.顶面积炭严重；Ⅴ.冷却侧结垢严重。

A. Ⅰ＋Ⅱ＋Ⅳ
B. Ⅰ＋Ⅱ＋Ⅳ＋Ⅴ
C. Ⅰ＋Ⅲ＋Ⅴ
D. Ⅰ＋Ⅱ＋Ⅴ

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在图17—1中，均衡的实际工资率是，同时均衡的就业是10亿小时／年。

A. 50美元；200
B. 10美元；100
C. 30美元；超过300
D. 20美元；125
E. 30美元；150

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The word "spray" (underlined in the third paragraph) means

A. oil mist
B. hot gas
C. injection
D. fuel oil

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In a modern three-phase A.C. synchronous brushes generator, the excitation winding is on the rotor. That means .

A. The generator need not excitation.
B. The winding on the rotor is for inputting excitation current.
C. There are three phase windings on the rotor.
D. The generator has no brushes.

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SOLAS Stands for the International Convention

A. for the Safety of the Life at Sea B. for the Prevention from ships C. on Standards of Training, Certification and Watchkeeping for Seafarers D. for the Control and Management of Ship's Ballast Water and Sediments

活塞顶面裂纹的原因是______。Ⅰ.冷却不良；Ⅱ.过热；Ⅲ.过冷；Ⅳ.顶面积炭严重；Ⅴ.冷却侧结垢严重。

在图17—1中，均衡的实际工资率是________，同时均衡的就业是________10亿小时／年。

The word "spray" (underlined in the third paragraph) means

In a modern three-phase A.C. synchronous brushes generator, the excitation winding is on the rotor. That means .

A. for the Safety of the Life at Sea
B. for the Prevention from ships
C. on Standards of Training, Certification and Watchkeeping for Seafarers
D. for the Control and Management of Ship's Ballast Water and Sediments

在图17—1中，均衡的实际工资率是，同时均衡的就业是10亿小时／年。