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【单选题】
在R、L、C串联电路中，当电流与总电压同相时，( )成立。
A.
ωL²C=1;
B.
ω²LC=1;
C.
ωLC=1;
D.
ω=LC。
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举一反三
【单选题】Seven years have passed I came to America．
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since
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from
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for
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【判断题】斯滕伯格智力成分中的成分智力是指个体在日常生活中，根据所需适应、选择所要的环境，及有效的改变、塑造环境的能力，大致可以理解为解决实践问题的能力。
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正确
B.
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【单选题】Years have passed. I find mother has________.
A.
a little white hair
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much white hair
C.
some white hair
D.
a few white hairs
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【单选题】下列措施，哪项不能防止积炭产生（）
A.
与足量的氧化合
B.
降低火焰压力
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加入三氧化硫、气态氢、碱土等抑制剂
D.
增大碳氢化合物的不饱和度
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【单选题】Two years has passed since I ______you the first time．
A.
meet
B.
have met
C.
met
D.
had met
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【单选题】Though nine years have passed,I still remember_________to Mr.Li during my visit there.
A.
introducing
B.
being introduced
C.
to be introduced
D.
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【单选题】Years have passed. I find Mother has...
A.
a little white hair
B.
much white hair
C.
some white hair
D.
a few white hairs
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【单选题】Fifteen years have passed since we graduated from the middle school.I have found she has______.
A.
some white hair
B.
much white hair
C.
a few white hairs
D.
a little white hair
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【单选题】Though eight years have passed. I still remember ______ to Mr. Ma during my visit there.
A.
introducing
B.
being introduced
C.
to be introduced
D.
introduced
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【单选题】想查找药典方面的图书,通过OPAC查询,下面哪种检索策略检索结果为0?
A.
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B.
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【单选题】Though nine years have passed,I still remember_________to Mr.Li during my visit there.
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【单选题】Years have passed. I find Mother has...
A.
a little white hair
B.
much white hair
C.
some white hair
D.
a few white hairs
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【单选题】Fifteen years have passed since we graduated from the middle school.I have found she has______.
A.
some white hair
B.
much white hair
C.
a few white hairs
D.
a little white hair
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【单选题】Though eight years have passed. I still remember ______ to Mr. Ma during my visit there.
A.
introducing
B.
being introduced
C.
to be introduced
D.
introduced
查看完整题目与答案
【单选题】想查找药典方面的图书,通过OPAC查询,下面哪种检索策略检索结果为0?
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R921.2[索书号]
B.
中华人民共和国药典[题名]
C.
药典[题名]
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