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Inflatable liferafts are less maneuverable than lifeboats due to their（）.
A . shape
B . shallow draft
C . large sail area
D . All of the above
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Most totally enclosed lifeboats are equipped with which of the following? （）
A . Tanks for the storage of drinking water
B . Ballast tanks to prevent the boat from capsizing
C . A hydraulic start diesel engine
D . Auxiliary mechanical propulsion (Fleming gear)
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What are the default values for GRE tunnel keeplive time and number of retries？（）
A . 5 seconds and 3 retries
B . 10 seconds and 5 retries
C . 10 seconds and 3 retries
D . 20 seconds and 5 retries
E . 5 seconds and 5 retrie
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When whistle signals are used for launching lifeboats，one short blast means（）.
A . use the float-free method only
B . lower all boats
C . raise all boats
D . drill is over，secure all boat
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The Master or person in charge of a ship shall insure that each deck from which lifeboats are launched is（）.
A . surfaced with a nonskid texture
B . roped off to prevent unnecessary access
C . kept clear of any obstructions that would interfere with launching
D . posted with a list of persons assigned to the lifeboat
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Stretchers are fitted in lifeboats to provide a（）.
A . place for people to lie down
B . means for rigging the sail
C . place for rowers to brace their feet
D . suitable means for water to drain below the footing
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A number of cylinder liners are enclosed in one cast iron casing to form a （）.
A . cylinder cover
B . cylinder block
C . cylinder frame
D . bed-plate
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Engines for lifeboats are required to have sufficient fuel to operate for how many hours?（）
A . 6 hours
B . 12 hours
C . 18 hours
D . 24 hour
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A number of bags are worn-out（）a certain extent.
A . at
B . in
C . on
D . to
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If there are a number of survivors in the water after abandoning ship，they should（）.
A . tie themselves to the unit so they won't drift with the current
B . form a small circular group to create a warmer pocket of water in the center of the circle
C . send the strongest swimmer to shore for assistance
D . form a raft by lashing their life preservers together
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Most lifeboats are equipped with （）.
A . unbalanced rudders
B . balanced rudders
C . contraguide rudders
D . straight rudder
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The lifeboats on your vessel are stowed on cradles on deck and are handled by sheath-screw boom davits. Which of the following statements about launching a boat is TRUE?（）
A . The boat should be hoisted a few inches clear of the cradle before cranking out the davits
B . The inboard gripes should be cast off before the outboard gripes
C . The outboard section of the cradle must be released
D . The tricing pendants will automatically bring the boat alongside at the embarkation deck
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In informal situations, a large number of compliments are used to make people feel comfortable.
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The number of the vowels are equal in English and Mongolian.
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In developing countries people are ________ into overcrowded cities in great numbers.
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The possible symbols in the binary numbering system are 0 to 9.（)
是
否
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There are still a number of factories in the area around Littleton.
A．Right
B．Wrong
C．Doesn't say
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More than 300,000 number sources are想（) every day, and expert number can be reserv
A．A.qualified
B．B.obtain
C．C.reasonable
D．D.buried
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_____number of students are playing _____ basketball on the playground.
A．a
B．A,/
C．The,a
D．The,the
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1 There are superstitions attached to numbers; even those ancient Greeks believed that all numbers and their multiples had some mystical significance.
2 Those numbers between 1 and 13 were in particular to have a powerful influence over the affairs of men.
3 For example, it is commonly said that luck, good or bad, comes in threes; if an accident happens, two more of the same kind may be expected soon afterwards. The arrival of a letter will be followed by two others within a certain period.
4 Another belief involving the number three has it that it is unlucky to light three cigarettes from the one match. If this happens, the bad luck that goes with the deed falls upon the person whose cigarette was the last to be lit. The ill-omen linked to the lighting of three things from one match or candle goes back to at least the 17th century and probably earlier. It was believed that three candles alight at the same time would be sure to bring bad luck; one, two, or four, were permissible, but never just three.
5 Seven was another significant number, usually regarded as a bringer of good luck. The ancient astrologers believed that the universe was governed by seven planets; students of Shakespeare will recall that the life of man was divided into seven ages. Seven horseshoes nailed to a house will protect it from all evil.
6 Nine is usually thought of as a lucky number because it is the product of three times three. It was much used by the Anglo Saxons in their charms for healing.
7 Another belief was that great changes occurred every 7th and 9th of a man's life.Consequently, the age of 63 (the product of nine and seven) was thought to be a very perilous time for him. If he survived his 63rd year he might hope to live to a ripe old age.
8 Thirteen, as we well know, is regarded with great awe and fear.
9 The common belief is that this derives from the fact that there were 13 people at Christ's Last Supper. This being the eve of his betrayal, it is not difficult to understand the significance given to the number by the early Christians.
10 In more modern times 13 is an especially unlucky number of a dinner party, for
example. Hotels will avoid numbering a floor the 13th; the progression is from 12 to 14, and no room is given the number 13. Many home owners will use 12 1/2 instead of 13 as their house number.
11 Yet oddly enough, to be born on the 13th of the month is not regarded with any fear at all, which just shows how irrational we are in our superstitious beliefs.
According to the passage, which of the following groups of numbers will certainly bring good luck to people？
A．3 and 7.
B．3 and 9.
C．7 and 9.
D．3 and 13.
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The number of United States citizens who are eligible to vote continues to increase.
A．encouraged
B．enforced
C．expected
D．entitled
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The account number is secure since according to federal law, the number of the cardholders' account printed out are ______.
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How many positive whole numbers less than or equal to 50 are NOT equal to squares of whole numbers？
A．9
B．15
C．43
D．44
E．45
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There are a number of students who want to join the drama club.（）
