99色精品-9色在线-99色在线-99色视频国产欧美日产一区二区三区_亚洲精品亚洲人成在线观看_四虎在线精品永久观看_免费一级a一片久久精

單項選擇題

Most propellers on merchant vessels are constructed of（）.

A.managanese bronze
B.cast iron
C.mild steel
D.improved plow steel

你可能感興趣的試題

單項選擇題

Mr.Jones was tired , he will（）over his duty of look out to another sailor.

A.take
B.think
C.hand
D.get

單項選擇題

My ship is equipped（）automatic hatch covers.

A.with
B.by
C.on
D.in

<tbody id="8wzae"></tbody>

<ruby id="8wzae"></ruby>

<ruby id="8wzae"><xmp id="8wzae"></xmp></ruby>