无码高清视频|成人自拍视频|欧美成人午夜无码A片秀色直播|草美女视频网站|美女被操网站在线观看

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>