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【单选题】
下列关于生物多样性面临威胁的原因叙述中，哪一项不正确？（ ）A.
毁林开垦，水土流失、环境恶化等原因造成森林面积锐减
B.
火山爆发、地震濒发、瘟疫流行等自然灾害是造成我国生物多样性锐减的重要原因
C.
人类对动植物资源的滥捕、乱伐及不合理的开发利用，造成大量物种濒临灭绝
D.
人类活动缺乏环保意识，造成生物生存环境的严重破坏造成的
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举一反三
【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】The word "dysphagia" means _______________.
A.
unable to eat
B.
unable to sleep
C.
difficulty in sleeping
D.
difficulty in swallowing
【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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