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【单项选择题】

Multi-year ice is the hardest sea ice and should be avoided if possible. It is recognizable because of what tone to its surface color? （）

A、A.Greenish

B、B.Bluish

C、C.Grey

D、D.Grey-white

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更多“Multi-year ice is the hardest sea ice and should be avoided if possible. It is recognizable because of what tone to its surface color? （）”相关的问题
第1题
[] Which statement concerning the navigation of a vessel in ice is FALSE?（）

A、A.Anchoring in the presence of ice is not recommended except in an emergency  B、B.Towing a vessel through an ice field is not recommended except in an emergency  C、C.The "Free and Proceed" system of escorting a beset vessel cuts down on the number of freeing operations  D、D.When anchoring in ice，it is advisable to increase the scope of the chain over what is normally used for non-icing conditions  

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第2题
[单选题] Others argue that since the earth has endured a long string of ice ages in the last two million to three million years, any warming is（）to be temporary.

A、seemed  B、likely  C、tended  D、possible  

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第3题
[单选题] The IOPP certificate is valid for （）

A、one year  B、two years  C、four years  D、five years  

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第4题
[单选题] The list of Coast Stations is republished（）in a trilingual.

A、every two years  B、every three years  C、every year  D、every four years  

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第5题
[单选题] The company has（）over the years into a multi-million dollar organization.

A、involved  B、resolved  C、evolved  D、revolved  

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第6题
[单选题] In regions where ice conditions prevail in the winter，（）.

A、the lantern panes of unattended lights may not become covered with ice or snow  B、the lantern panes of unattended lights may become covered with ice or snow  C、ice or snow is likely caused colored  D、the white lights are likely caused to appear colored  

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第7题
[单选题] You are on an ice-reinforced vessel about to enter packice. You should（）.

A、enter the pack on the windward side where there is a well defined ice edge  B、trim to an even keel or slightly down by the bow to take maximum benefit of the ice reinforcement  C、take maximum advantage of coastal leads caused by offshore winds  D、look for areas of rotten ice and enter perpendicular to the ice edge  

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第8题
[单选题] You want to track and store all transactional changes to a table over its lifetime. To accomplish this task, you enabled Flashback Data Archive with the retention of 5 years. After some time, the business requirement changed and you are asked to change the retention period from 5 years to 3 years. To accomplish this, you issued the following command: ALTER FLASHBACK ARCHIVE fla1 MODIFY RETENTION 3 YEARS; What is the outcome of this command?（）

A、The command produces an error because the retention period cannot be reduced  B、All historical data older than 3 years is purged from the flashback archive FLA1  C、All historical data is retained but the subsequent flashback data archives are maintained for only 3 years  D、All historical data is transferred to flashback logs and the flashback archive is refreshed to set a new retention time  

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第9题
[单选题] The International Oil Pollution Prevention Certificate is valid for a period of （）.

A、one year from the date of issue  B、two years from the date of issue  C、three years from the date of issue  D、four years from the date of issue  

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