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【单选题】

What is meant by the term “radio silence”?（）

A、Stations not directly involved with the on-going distress communications may not transmit on the distress frequency or channel

B、Stations remaining off the air to safeguard proprietary information

C、Two three-minute silent periods，at 15 and 45 minutes after the hour，that provide a transmitting "window" for distressed vessels to transmit distress alerts using J3E

D、Communications on a distress frequency or channel is banned for 24 hours following the cessation of the distress traffic

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第1题

[单选题] What is meant by the term TOPPING THE BOOM?（）

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第2题

[单选题] What is meant by the term“luffing the boom”of a crane（）．

A、Stopping the boom B、Topping or lowering the boom C、Moving the boom left or right D、All of the above

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第3题

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第4题

[单选题] What is meant by the term “broaching to”? （）

A、Having the vessel head toward the sea B、Running before a sea C、Being turned broadside to the sea D、Having the vessel filled with water

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第5题

[单选题] What is meant by veering the anchor chain? （）

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第6题

[单选题] What is meant by the term overhaul in firefighting?（）

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第7题

[单选题] What is meant by spotting the boom?（）

A、Lowering it into a cradle B、Placing it in a desired position C、Spotting it with wash primer and red lead D、Two-blocking it

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第8题

[单选题] In the Junos OS, what handles transit traffic?（）

A、Transit traffic is handled by the RE only B、Transit traffic is handled by the PFE only C、Transit traffic is handled by both the RE and the PFE D、Transit traffic is not handled by the RE or the PFE

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第9题

[单选题] View the Exhibit for some of the parameter settings. You start a session and issue the following command: SQL>CREATE INDEX emp_ename ON emp(ename) TABLESPACE users INVISIBLE; What is the outcome of the above command?（）

A、The index is not used by the optimizer but is maintained during DML operations. B、The index is not used by the optimizer and is not maintained during DML operations. C、The index is used by the optimizer only if a hint is specified in the query statement and is maintained during DML operations. D、The index is used by the optimizer only if a hint is specified in the query statement but is not maintained during DML operations.

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