能提高左旋多巴疗效的药物是()。
A.多巴酚丁胺
B.多巴胺
C.氯丙嗪
D.α-甲基多巴
E.卡比多巴
第1题
A.mechanization is not yet introduced in some areas for economic reasons
B.human and animal labour in some areas are less expensive
C.culture is not a factor in obstacling the introduction of mechanization
D.different kinds of mechanized farming tools are used in different cultures
第2题
A.mechanization is not yet introduced in some areas for economic reasons
B.human and animal labour in some areas are less expensive
C.culture is not a factor in obstacling the introduction of mechanization
D.different kinds of mechanized fanning tools are used in different cultures
第3题
第4题
What are the problems with the printer Peter bought?
There are some problems with the paper, ______ and the ______ take-up reel.
第5题
What do you mean ______ "Help yourself to some fish"?
A.for saying
B.to speaking
C.by saying
第6题
A.if
B.unless
C.although
D.because
第7题
By saying that "some tips are certainly in order" (line 2), the author means that ______.
A.some advice for the trip is necessary
B.some small changes are useful
C.business experience is helpful
D.careful planning is a must
第8题
By saying that "some tips are certainly in order" (Line 2), the author means that ______.
A.business experience is helpful
B.some small changes are useful
C.some advice for the trip is necessary
D.careful planning is a must
第9题
Some experts say water problems contributed to war in 1967 between ________.
A.Israel and Syria
B.Israel and Jordan
C.Israel and Palestine
D.Israel and Egypt
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