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【单选题】
红细胞内缓冲系统中,最重要的缓冲对是:( )A.
KHbO2/HHbO2
B.
KHb/HHb
C.
K2HPO4/KH2PO4
D.
KHCO3/H2CO3
E.
HN3/NN+4
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举一反三
【单选题】She didn't achieve her ______ of becoming a famous writer. [ ]
A.
characteristic
B.
ambition
C.
profession
D.
stage
【单选题】—What can I do famous? —You must study hard. [ ]
A.
become
B.
to become
C.
became
D.
becoming
【单选题】Tom is into sports.When young ,he had a _____about becoming a famous football player.
A.
expectation
B.
interst
C.
try
D.
fantasy
【单选题】It is said that her dream of becoming a famous singer () at last.
A.
turned true
B.
realized
C.
lived
D.
came true
【单选题】I am sure that my dream of becoming a famous player will ______. [ ]
A.
come true
B.
come out
C.
come up
D.
come along v
【单选题】He is on his way to becoming a world-famous pianist. But can you imagine him ____ so many kinds of hardships?
A.
goes through
B.
go through
C.
going through
D.
went through
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