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【单选题】
参与I型变态反应的效应物质是( )
A.
补体
B.
IgE
C.
NK细胞
D.
IgG
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【单选题】( )能通过抑制叶酸合成而抑制细菌生长。
A.
青霉素
B.
磺胺类药物
C.
四环素
D.
其余选项都对
【简答题】Most people want to be happy, but few know how to find happiness. Money and success alone do not bring lasting happiness. Aristotle, a Greek thinker, said, 'Happiness depends upon (取决于)ourselves.' In ...
【单选题】听力原文:M: What's the matter with Mary? W: She becomes nervous whenever it comes to learning mathematics. Q: What do we learn from the conversation? (16)
A.
Mary has never studied mathematics.
B.
Mary must be good at mathematics.
C.
Mary enjoys learning mathematics.
D.
Mary probably is poor at mathematics.
【单选题】find v.
A.
计算
B.
发现
C.
满足
【单选题】( )能通过抑制叶酸合成而抑制细菌生长。
A.
( 1 )青霉素
B.
( 2 )磺胺类药物
C.
( 3 )四环素
D.
( 4 )以上所有
【单选题】现存的计算机平台中,哪些系统目前还没有发现被病感染
A.
Windows
B.
Unix/Linux
C.
Dos
D.
以上都不是
【简答题】并联电路发生谐振时,品质因数 Q= R ( XL ) ,此时,电感或电容支路电流会 __________ 总电流,所以并联谐振又称 __________ 。
【简答题】Most people want to be happy, but few know how to find happiness. Money and success alone do not bring lasting(永恒的、永久的) happiness. Aristotle (亚里士多德), a Greek thinker, said, “Happiness depends upon our...
【单选题】( )能通过抑制叶酸合成而抑制细菌生长。
A.
青霉素
B.
磺胺类药物
C.
四环素
D.
多氧霉素
【简答题】Most people want to be happy, but few know how to find happiness. Money and success alone do not bring lasting happiness. Aristotle, a Greek thinker, said, 'Happiness depends upon ourselves.' In other...
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