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To ensure the safety in operating hatch covers, oil the moving parts （）.
- A、monthly
- B、every three months
- C、once monthly
- D、every two months
参考答案
更多 “To ensure the safety in operating hatch covers, oil the moving parts （）.A、monthlyB、every three monthsC、once monthlyD、every two months” 相关考题
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Questions 46-48 refer to the following letter.
Theater Digest
125 Lake Ave
Chicago, IL, 606i6
Dear Subscriber,
Your subscription to Theater Digest will end in two months. Please don't let that happen. Take time to renew your subscription today. By doing so, you will continue to receive every month theway latest in theater reviews, information on actors and directors, and up-to-date reports on newdramas and musical for the next year.
I’ve attached an invoice for your renewal order. You will receive 12 issues for special lowprice of $35. Please send your payment in the reply envelop provided. Make any corrections to yourname or address right on the back of the invoice. Then visit our website at www.theaterdigest.comto read about contests for readers. You could win tickets to great show.
Sincerely.
Matthew Chambers
Customer Service Representative
How often is Theater Digest published?
A. Once a month
B. Every two months
C. Twice a year
D. Once a year
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救生艇下水每隔三个月进行一次。（）A、Lifeboat launching is operated at intervals of three months.B、Lifeboat launching is operated at intervals for three months.C、Fire drill is carried out once a month.D、Don’t operate two or more hatch covers at the same time.
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问答题What occurs once in every month, twice in every moment, but not once in a thousand years?
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单选题To ensure the safety in operating hatch covers, oil the moving parts （）.A
monthlyB
every three monthsC
once monthlyD
every two months
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a monthB
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a 5 second ringing of a bell forward and a 5 second sounding of a gong aft at intervals of 1 minuteB
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one prolonged followed by three short blasts every minuteD
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单选题（）of the following need not be entered in the official logbook?A
The testing of the internal combustion engine driven emergency generator at least once each month the vessel is navigatedB
The testing of storage betteries for emergency lighting and systems once each 6 months the vessels is navigatedC
The actual draft when the vessel arrives in salt water after department a portD
The testing of the line-throwing appliance once every 3 months
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weekB
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3 months
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annually by the owner，with a letter submitted six months before expirationB
only once every five years，with a letter submitted six months before expirationC
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单选题Coast Guard regulations require a shipboard Oil Pollution Emergency Plan to be reviewed（）.A
annuallyB
once every two yearsC
once every four yearsD
once every five years
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