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【单选题】
蓝氏贾第鞭毛虫主要的传染源是
A.
无症状带虫者
B.
患者
C.
病畜
D.
保虫宿主
E.
转续宿主
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【单选题】Can trees talk Yes, but not in words. Scientists have reason to believe that trees do communicate with each other. Not long ago, researchers learned some surprising things. First, a willow tree attack...
A.
touching one another
B.
C.
B. smelling one another
D.
C. unusual sounds
E.
D. special movements
【单选题】Man, even in the lower stages of development, possesses a faculty which, for want of a better name, I shall call Number Sense. This faculty permits him to recognize that something has changed in a sma...
A.
dependent on r mental activity
B.
found in animals as well as man
C.
farther up the evolutionary scale
D.
present in animals on the basis of much evidence
相关题目：
【单选题】Can trees talk Yes, but not in words. Scientists have reason to believe that trees do communicate with each other. Not long ago, researchers learned some surprising things. First, a willow tree attack...
A.
touching one another
B.
C.
B. smelling one another
D.
C. unusual sounds
E.
D. special movements
【单选题】Man, even in the lower stages of development, possesses a faculty which, for want of a better name, I shall call Number Sense. This faculty permits him to recognize that something has changed in a sma...
A.
dependent on r mental activity
B.
found in animals as well as man
C.
farther up the evolutionary scale
D.
present in animals on the basis of much evidence
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