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【多选题】
下列对于光影的描述,正确的是?A.
用光造影，以影造型。
B.
在天幕、景片上投射的影像，可称为光影。
C.
用灯光营造的人物剪影的效果，属于光影。
D.
用成像灯、电脑灯投射到舞台上的光斑图案，属于光影。
E.
现代演出使用的视频影像，也可称之为光影。
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【单选题】We have not obtained very much experiment data ______ conclusion between the two possibilities.
A.
on which to base
B.
to base on
C.
which is based on
D.
to be based on
【简答题】Olaf Stapledon wrote a book called First and Last Men, in which he looked millions of years ahead. He told of different men and of strange civilisations（文明）, broken up by long 'dark ages' in between. ...
【单选题】Which of the following is true of Livingston?
A.
He thinks he has discovered a new possibility in the link between sun spots and the weather on the Earth.
B.
He has great doubts about the theory that the sun' s frequent changes have an influenced on the Earth' s climate.
C.
He has been recently informed by other scientists of the possibility that more sun spots will appear.
D.
He does not think the causes of the sun spots will be fully revealed by scientists in the near future.
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