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【单选题】
下列各对物质,能组成缓冲溶液的是A.
NaOH-HCl
B.
KCI-HCl
C.
H2CO3-Na2CO3
D.
CH3COOH-CH3COONa
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【多选题】Western opera is a combination of
A.
music
B.
theater
C.
literature
D.
dance and painting
【单选题】Which part is Beijing Opera especially good at and very different from Western opera?
A.
Singing.
B.
Dancing.
C.
Acrobatics.
D.
Music.
【多选题】Western opera is a combination of( ).
A.
music
B.
theater
C.
literature
D.
Dance and painting
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B.
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C.
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D.
Running and skiing.
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