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【单选题】
下列各数:-4/5,1,8.6,-7,0,5/6,-2/3,+101,-0.05,-9 中A.
只有1，–7，+101，–9是整数
B.
其中有三个数是正整数
C.
非负数有1，8.6，+101，0，
D.
有三个是负分数
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【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】The word "dysphagia" means _______________.
A.
unable to eat
B.
unable to sleep
C.
difficulty in sleeping
D.
difficulty in swallowing
【简答题】dysphagia:
【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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