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.
我们用船上的备件来更换损坏的部件。
A. Werepairedthedamagedparts.
B. Wereplacedthedamagedpartonboard.
C. Weusedthesparepartsonboardtoreplacethedamagedparts.
D. Sparepartscanbeusedtoreplacethedamagedparts.
船上更多使用水管锅炉。
A. Water-tubeboilerisbetterthananykindofboiler.
B. Fire-tubeboilerisbetter.
C. Water-tubeboilercandelivermoresteam.
D. Therearemorewater-tubeboilerusedonboard.
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