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【单选题】
近视眼的护理要点，正确的是A.
读书写字姿势要正确，眼与书本30cm
B.
连续看书写字2小时左右要休息或望远片刻
C.
在光线暗处及直射阳光下看书
D.
躺在床上及走路或乘车时看书
E.
连续看书写字0.5小时左右要做眼保健操
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举一反三
【简答题】女子个人时间为___________。 A、30秒 C、60秒 B、90秒 D、120秒
【单选题】If an electric cargo winch is being used to lift a draft of cargo and the engine room loses all power，which will occur ________．
A.
A pawl，forced by a spring mechanism，will engage the teeth of the bull gear and hold the load
B.
An electromagnetic brake will hold the load where it is suspended
C.
The load will fall rapidly to the deck unless the foot brake is engaged
D.
The load will slowly lower to the deck under control of the drag of the winch motor
【单选题】Electric cargo winches have an overload safety device which normally cuts the current to the winch motor（）.
A.
after torque cause line pull to exceed the rated capacity of the winch
B.
before the line pull reaches the rated capacity of the winch
C.
when the line pull reaches the breaking strengh of the fall
D.
before the safe working load of the fall is reached
【简答题】80分=（ ）时（ ）分 60秒=（ ）分 1分40秒=（ ）秒
【简答题】我会比．（填“＞”“＜”或“﹦”） 60分______60秒 20分______1时 1分______85秒 60秒______1分 1时______55分 90分______1时．
【单选题】Electric cargo winches have an overload safety device which normally cuts the current to the winch motor（）.
A.
after torque causes line pull to exceed the rated capacity of the winch
B.
before the line pull reaches the rated capacity of the winch
C.
when the line pull reaches the breaking strength of the fall
D.
before the safe working load of the fall is reached
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