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【单选题】
单选题-磺胺嘧啶的抗菌机制是A.
抑制二氢叶酸合成酶
B.
改变细菌细胞膜通透性
C.
破坏细菌细胞壁的合成
D.
抑制二氢叶酸还原酶
E.
抑制细菌DNA回旋酶
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【简答题】液体压强具有两个重要特性：1）流体静压强的方向与作用面垂直，并指向作用面；2）静止流体中的任何一点压强，在各个面上不一定都是相等的。
【单选题】Can you sing? We need _____actors for the talent show. [ ]
A.
some much
B.
more some
C.
some more
D.
many more
【简答题】流体具有( ) 和( )两个特性 。
【简答题】According to some scientists, Hemps arepreferable to trees chiefly because [A] they are more easily cultivated. [B] they have been cultivated by manycultures for a long time. [C] they can produce more...
【判断题】Every change of season produce some change in the magical hues and shapes of these mountains.()
A.
正确
B.
错误
【单选题】Mo Yan has published dozens of novels, of _____some are very popular among Chinese readers, Red Sorghum, for example.
A.
those
B.
whose
C.
whom
D.
Which
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