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【单选题】
磺胺类药物抑菌作用是是属于哪种抑制A.
可逆性抑制
B.
竞争性抑制
C.
非竞争性抑制
D.
不可逆抑制
E.
以上都不是
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反馈参考答案：
举一反三
【单选题】用草酸钠做基准物质标定高锰酸钾溶液时。开始反应速度较慢,稍后反应速度明显加快,这是( )起催化作用。
A.
H +
B.
MnO 4 -
C.
Mn 2+
D.
CO 2
【简答题】Who asked the author such a question?
【单选题】The author became a little impatient for ____.
A.
he couldn't stand up with the shoe repairer's modest attitude
B.
he was in a hurry to meet a friend
C.
the shoe repairer was sad and did nothing about his torn shoes
D.
it took the shoe repairer a long time to have his shoes repaired
【单选题】用草酸钠作基准物质标定高锰酸钾标准溶液时,开始反应速率慢,稍后,反应速率明显加快,这是( )起催化作用。
A.
H +
B.
MnO 4-
C.
Mn 2+
D.
CO 2
【单选题】We can't _____ one to change the habits of a lifetime in a short time.
A.
hope
B.
wait
C.
expect
D.
imagin
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