97免费在线观看视频,亚洲综合自拍网,黄色毛片免费观看,热久久综合网,免费看日产一区二区三区狠狠操av,久久久涩涩涩,在线精品免费视频,人人插天天干,久久91精品国产91久久

單項(xiàng)選擇題

The four-stroke engine is used for （） and sometimes for main propulsion with a gearbox to provide a propeller speed of between 90 to 120 rev/min.

A.alternator
B.turbo-charger
C.remote controller
D.windlass

你可能感興趣的試題

單項(xiàng)選擇題

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

A.suction
B.compression
C.expansion
D.exhaust

單項(xiàng)選擇題

The fine filters will be arranged （） one can be cleaned while the other is operating.

A.in order to
B.because of
C.so that
D.so as to

<pre id="eckqk"><acronym id="eckqk"></acronym></pre>

<ins id="eckqk"></ins>