发电机提供电力。
A. Thegeneratorenginesupplieselectricpower.
B. Themainenginesuppliesdrivingpower.
C. Thegeneratorengineworkswell.
D. Themainengineworkssmoothly.
我想知道船上有多少名海员。
A. Idon'tknowtheseamenonboard.
B. Iwanttoknowthenameoftheseameninport.
C. Idon'tknowthenumberoftheseameninport.
D. Iwanttoknowhowmanyseafarersworkonboard.
齿轮泵属于容积泵。
A. Gearpumpbelongstopositivedisplacementpump.
B. Screwpumpbelongstopositivedisplacementpump.
C. Gearpumpbelongstocentrifugalpump.
D. Gearpumpbelongstonon-positivedisplacementpump.
那艘船是我们到达前两天离开的。
A. Theshipleftthreedaysago.
B. Theshiplefttwodaysbeforewearrived.
C. Theshiplefttwodaysafterwearrived.
D. Wearrivedtheretwodayslaterthantheshipdid.
交流发电机在预热器附近。
A. Thereisageneratorbythepreheater.
B. Thealternatorisnearthepreheater.
C. Thepreheaterisclosed.
D. Thepreheaterisbehindthealternator.
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