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【判断题】
紫外可见分光光度计必须配备专用的稳压电源后才能使用。A.
正确
B.
错误
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举一反三
【单选题】Passage 2 Some people believe that cigarette smoking is dangerous and should therefore be considered a health hazard . They want their governments to create anti-smoking programs. People differ as to ...
A.
jumping, running or climbing
B.
working, sleeping or resting
C.
using,smoking or eating
D.
washing,bathing or cleaning
【单选题】What have high．income countries done to smoking?
A.
Banned smoking in the public and reduced tobacco taxes．
B.
Banned public smoking and established tobacco taxes．
C.
Dropped smoking rates and banned smoking in public．
D.
Dropped smoking rates and lowered tobacco taxes．
【单选题】Where can a user find the System32 folder on a Windows Vista x64 system?（）
A.
C:///Windows/System32（x64）
B.
C:///Windows/System
C.
C:///Windows/System32
D.
C:///Windows（x64）/System32
【简答题】561-______72=561-（128□72） A-B-______=A-（______□C） 125×______-25×=（______□______）x （A+B）×______=______×C+______□C 102×______=______×50+______×50．
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