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【单选题】
最容易受艾滋病感染的几个高危人群是A.
性乱人群、男性同性恋、吸毒人群
B.
高收入人群、青少年人群
C.
贫困群体、白领阶层
D.
社交活动较多人群
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【简答题】属于我国原产和特产,有“菜中之王”美誉的叶类蔬菜是( )。
【简答题】小麦条锈病的发生和流行主要取决于( )、( )以及( )。
【简答题】The author’s purpose in writing this passage is ________. A) to describe the difficulties in solving humanity’s current problems B) to present the different views on humanity’s current problems C) to ...
【简答题】Defining the meaning of 'happiness' is a perplexing proposition because it is very difficult to ______.
【单选题】We went through a period communications were very difficu1t in the rura1 areas. （ ）
A.
which
B.
whose
C.
in which
D.
with which
【单选题】As well as being intangible, what is the problem with emotions ?
A.
They are difficult.
B.
They are compounded.
C.
They are difficult to qualify.
D.
They do not operate in isolation.
【单选题】The two rings are so alike thatit is difficult to tell one theother ．
A.
． very ； to
B.
． much ； to
C.
． much ； from
D.
． very ； from
【单选题】choice of investigation in case of detection of dismotility in esophageal dysphagia?
A.
Endoscopy
B.
Biopsy
C.
Manometry
D.
Video fluoroscope
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