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【单选题】
硝苯地平抗心绞痛主要是选择性阻断心肌细胞和血管平滑肌细胞的A.
Na+内流
B.
Ca2+内流
C.
K+外流
D.
Ca2+外流
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举一反三
【单选题】Though great efforts have been on their study , Annie still can’t make any improvements , which makes her parents greatly ______ .
A.
made ; disappointed
B.
done ; disappointing
C.
taken ; disappointed
D.
given ;disappointing
【单选题】According to the author, most people realize that______.
A.
great efforts have been made to solve the energy problem
B.
the automobile uses large amounts of gasoline
C.
car pools help to solve some of the energy problem
D.
alternate sources of energy must be found
【单选题】Great efforts have been made to ________the diplomatic relations between the two countries.
A.
normalize
B.
modernize
C.
mechanize
D.
standardize
【单选题】Scientists have found no ________of life on Mars so far,though great efforts have made on the research.
A.
symbols
B.
signs
C.
marks
D.
signals
【单选题】Great efforts have been ____to improve people’s living conditions in China in the past two years.
A.
got
B.
won
C.
made
D.
did
【单选题】Though great efforts have been ________on her study,Annie can’t still make any improvements,which makes her parents greatly________.
A.
made;surprised
B.
done;surprising
C.
taken;surprised
D.
given;surprising
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