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【单选题】
临床计算妊娠开始的时间是A.
受精之日
B.
未次月经干净之日
C.
末次月经第一日
D.
夫妻同房之日
E.
末次月经后14日
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举一反三
【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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