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【单选题】
What is tree of robotic drivers?A.
It will take some time before robotic drivers can be put to practical use.
B.
Robotic drivers are not allowed to drive on busy roads.
C.
Robotic drivers can never replace human drivers.
D.
Robotic drivers are too expensive to use.
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【单选题】The last sentence 'This curious fact...' leads us to conclude that ______.
A.
thunderstorms break out over a lake
B.
thunderstorms have something to do with the heat from the sun
C.
thunderstorms are often seen in winter, too
D.
thunderstorms have never happened in dark materials
【单选题】More thunderstorms ______ in summer than any other time of the year.
A.
happened
B.
have happened
C.
happen
D.
will happen
【简答题】芳香酮类化合物C=O伸缩振动频率向低波数位移的原因为（ ）
【多选题】某律师接受当事人委托参加民事诉讼,以下属于委托代理权消灭的原因有( )。
A.
诉讼终结
B.
当事人解除委托
C.
代理人辞去委托
D.
委托代理人死亡
E.
委托代理人有过错
【单选题】听力原文： Thunderstorms are the least dangerous and least violent of all the storms. Almost everyone has experienced a thunderstorm with its heavy rains, high winds, lightning and accompanying thunder. Th...
A.
Equivalent to a hydrogen bomb.
B.
Equivalent to tons of TNT.
C.
Equivalent to tons of hydrogen bombs.
D.
Equivalent to a ton of TNT.
【单选题】Thunderstorms have struck northern China, ______ heavy rain and ______ traffic chaos.
A.
brought, caused
B.
bringing, causing
C.
having brought, having caused
D.
to bring, to cause
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