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【单选题】
下列实例中属于用热传递的方式改变物体的内能的是（ ）A.
飞驰的流星拖着一条发光的“尾巴”
B.
冬天用热水袋取暖
C.
锯木头时锯子发烫
D.
两手相互摩擦，手变暖
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【简答题】如何增强国家文化软实力?
【单选题】According to the passage, which of the following is CORRECT?
A.
One can't conquer the Channel before 18-year-old or after 60-year-old age.
B.
In 1978, Penny Lee Dean set a record of 21 hours and 45 minutes in the Channel swimming.
C.
It was Philip Lee Dean who successfully completed the only triple crossing.
D.
The swimmer who has successfully made a double crossing on five separate occasions is from Canada.
【简答题】Suppose you turn on your TV set and see a show in black and white. Do you switch the channel although you don't want to watch some 'old' movie S1.______ or program? Television broadcasters believe tha...
【简答题】函数 为奇函数， 为偶函数（定义域均为R）若 时： ，则 _________.
【单选题】Fairy stories are a means by which children's impulses may be ______.
A.
beneficially channeled
B.
given a destructive tendency
C.
held back until maturity
D.
effectively suppressed
【简答题】设函数 是定义域R上的奇函数，且当 时， 则当 时， ____________________
【简答题】函数 的定义域为R，则 m 的取值范围是____________．
【简答题】若函数 定义域为R，则 的取值范围是________．
【简答题】已知函数 的定义域是R，若对于任意 为其定义域上的增函数，则函数 的图像可能是 （ ）
【简答题】若函数 的定义域是R，求m的取值范围。
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