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

（） thrust and resistance equal each other, the ship always travels at a constant speed.

A.As long as
B.As far as
C.As well as
D.Unless

你可能感興趣的試題

單項(xiàng)選擇題

（）, we kept removing the pistons.

A.Late as it was
B.As it was late
C.Since it was late
D.Because of its late

單項(xiàng)選擇題

The value of GM still remains one meter, meanwhile we can pump the ballast water to（） the ship on even keel.

A.make
B.put
C.keep
D.get

<pre id="kskid"><strong id="kskid"></strong></pre>