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

<sup id="fcmi8"><pre id="fcmi8"><div id="fcmi8"></div></pre></sup>

<ins id="fcmi8"></ins>

單項選擇題

Before welding in a tank that has carried petroleum products，the tank must be certified by （）.

A.the Coast Guard
B.the ABS
C.the shipyard fire department
D.a certified marine chemist

你可能感興趣的試題

單項選擇題

Before welding can be done in a tank that has carried petroleum products，a certificate must be obtained from（）.

A.the customs
B.the Register Bureau of shipping
C.the shipyard fire department
D.a certified gas chemist

單項選擇題

At the same time，it is（）for you to signify your acknowledgement of the responsibility for the collision by signing the copies of this letter hereto attached and to return me two copies in due time.

A.essential
B.important
C.good
D.a better operation

<dd id="fily7"></dd>

<dd id="fily7"></dd>