【多选题】【消耗次数：1】
关于动机与学习效率的关系，正确的有（）。
①
动机越高，学习效率不一定越高
②
困难任务的最佳动机水平低于容易任务的最佳动机水平
③
动机越高，学习效率也越高
④
过高的学习动机与过低的动机都会降低学习效率
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学习动机与学习效果的关系是（ ）。
①
学习动机越强，学习的效果越好
②
在比较容易的学习活动中，学习效率随动机提高而上升
③
难度大的学习任务比难度小的学习任务的最佳动机水平低
④
人在中等动机强度下学习效率最高
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依据心理学关于学习动机与学习活动关系的描述， 则(?? )。
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学习动机越弱越好
②
学习动机越强越好
③
学习动机的强度以适中为宜
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学习动机对学习活动产生消极作用
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______, the free luggage allowance is 20 kilos.
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As a rule
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As though
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As if
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As well
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All the mobile phones must______ before the meeting starts.
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be turning off
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turn off
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be turn off
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be turned off
【单选题】
______，the boy worked out the problem quickly．
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As clever he is
②
Clever as he is
③
He is as clever
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As he is clever
【单选题】
The residents, _____had been damaged by the fire, were given help by the Red Cross.
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all of their homes
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all their homes
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whose all homes
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all of whose homes
【单选题】
―______?―Id like to send this parcel to one of my friends.
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What are you doing here
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Whats your name
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Where are you from
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How may I help you
【单选题】
Not until the pretty woman opened her mouth and spoke, ______she was a foreigner.
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did I realize
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had I realized
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I had realized
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I realized
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Many passengers for a plane journey would like to reserve a ______ seat or aisle seat.
①
vision
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view
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glass
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window
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I have lost my white hat. I______ it somewhere.
①
must be dropping
②
must have dropped
③
must have been dropped
④
must drop
【单选题】
Only when we landed______ how badly the plane had been damaged.
①
we realized
②
did we realize
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had we realized
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we had realized