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【单选题】
需配制 pH = 9.6 的缓冲溶液,选用A.
HCOOH － HCOONa
B.
HAc － NaAc
C.
NaHCO 3 － Na 2 CO 3
D.
任何缓冲剂都好
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A.
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A.
Thank you.
B.
I agree.
C.
Of course.
D.
Good luck.
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A.
English
B.
French
C.
Chinese
D.
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【单选题】Australia Day marks ________.
A.
independence of Australia
B.
the discovery of Australia
C.
the foundation of the first British colony
D.
the foundation of the commonwealth of Australia
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