下列各项中，能够申请发行可交换公司债券的有（）。

A.Bill of Lading

B.Logbook entry

C.Manifest

D.Shipping document

While underway and towing an unmanned tank barge you are required to ______.

A.maintain a strict watch on the barge from the towing vessel

B.fly a red flag from the towing vessel

C.open the tops of all empty tanks on the barge

D.take hourly soundings of any loaded tanks on the barge

The number or name of a tank barge shall be ______．

A.Displayed in at least 4 different positions on the barge

B.Carved on a wooden board and attached to the barge's hull

C.Displayed as close to the navigation lights as possible

D.Displayed at the highest point of the barge's hull such that it can be seen from either side

A.change of employment

B.permit to proceed

C.application for inspection

D.temporary certificate of inspection

A tank has been sealed and unventilated(不通风的) for a long period of time. Which of the following conditions does this indicate？

A.The tank is safe to enter

B.The tank is especially dangerous to enter

C.Carbon monoxide(一氧化物) is present

D.Water vapor present when the tank was sealed has oxidized(使氧化)

A.The tank is safe to enter

B.The tank is especially dangerous to enter

C.Carbon monoxide is present

D.Water vapor present when the tank was sealed has oxidized

A.Gas Free Certificate

B.Certificate of Inspection

C.Permit to Proceed and Hot Work Permit

D.All of the above

A.Pumproom

B.Generator room

C.A space adjacent to a cargo tank

D.A space two meters from a cargo valve