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Hurricanes may move in any direction．However，it is rare and generally of short duration when a hurricane in the Northern Hemisphere moves toward the ______．
A.West or northwest
B.Northeast
C.Southeast
D.North
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单选题The horse latitudes are characterized by（）.A
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The Error class is a Runtime Exception.B
No exceptions are subclasses of Error.C
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any statement that may throw an Exception must be enclosed in a try block.E
Any statement that may throw an Runtime Exception must be enclosed in a try block.
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单选题Weather conditions in the middle latitudes generally move（）．A
EastwardB
WestwardC
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Southward
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over 3 knots headwayB
at any speed asternC
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单选题Which statement is TRUE concerning the danger signal?（）.A
When any vessel fails to understand the intentions of an approaching vessel she must sound the danger signalB
Only the stand-on vessel can sound the danger signalC
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The danger signal consists of 4 or more short blasts of the whistle
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those who habe long-term goals will succeedB
writing down the dates may discourage youC
the goal is only a guide for us to reach our desinationD
every should have a goal
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单选题When two vessels are in sight of one another and NOT in or near an area of restricted visibility，any of the following signals may be given EXCEPT（）.A
a light signal of at least five short and rapid flashesB
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four short whistle blastsD
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单选题It's no use _____ any longer, He may come by any bus.A
waitingB
to waitC
having waitedD
to have waited
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单选题Which of the following statements about transmitting distress messages by radiotelephone is INCORRECT?（）A
Distress messages should first be transmitted on 2182 kHzB
Channel 16 (156.8 MHz) may be used for distress messagesC
If no answer is received on the designated distress frequencies，repeat the distress call on any frequency availableD
It is advisable to follow a distress message on 2182 kHz by two dashes of 10 to 15 seconds duration
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单选题What is the impact of the following backup if it exceeds the duration allowance？（） Backup as compressed backupset duration 2：00 partial minimize load database ；A
The entire backup will fail.It will not be usable for recovery.B
The entire backup will failbut any datafile successfully backed up will be usable for recovery.C
If this backup fails，subsequent backups will prioritize datafiles not backed up.D
If this backup fails，an error will be raised and any other commands will not be executed. E
If this backup fails，no error will be raised and any other commands will be executed.
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单选题Hurricanes may move in any direction．However，it is rare and generally of short duration when a hurricane in the Northern Hemisphere moves toward the（）.A
West or northwestB
NortheastC
SoutheastD
North
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单选题Good anchorage may be obtained anywhere in this water area，the bottom being generally mud and sand，vessel may have（）.A
good getting groundB
good holding groundC
good grabbing groundD
good handling ground
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单选题Good anchorage may be obtained anywany, generally mud and sand, in this water area. Vessel may have（）.A
good towing groundB
good holding groundC
good grabbing groundD
good dragging ground
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