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【单选题】对旋毛虫生活史的描述下列哪项是错的:
A.
成虫和幼虫同时寄生在一个宿主体内
B.
多种动物可作为旋毛虫的宿主
C.
雌虫产出的虫卵经淋巴管或小静脉达横纹肌发育为幼虫并成包囊
D.
约半年后囊包钙化，囊内幼虫死亡
E.
雌虫寿命约一个月，每条一生共产幼虫500—2000条
【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. making unusual sounds
E.
D. making special movements