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【单选题】
版画的价格大致可以分为两类:一类是消费级,另一类是( )A.
收藏级
B.
高级
C.
普通级
D.
低级
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举一反三
【单选题】The researchers have tested their spray in the lungs.
A.
Right
B.
Wrong
C.
Not mentioned
【简答题】The researchers have conducted an experiment to prove that people will act in emergencies when ______ A) they are in pairs B) they are in groups C) they are alone D) they are with their friends
【简答题】The researchers have just completed a study of driving situations.
【单选题】The researchers have conducted an experiment to prove that people will act in emergencies when______.
A.
they are in pairs
B.
they are in groups
C.
they are alone
D.
they are with their friends
【单选题】Researchers have known for years that animals have a 'clock' somewhere in their brains a control-centre that regulates circadian(生物节奏的) rhythms. Circadian rhythms are the body's daily biological cycle...
A.
Right
B.
Wrong
C.
Not mentioned
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