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刷刷题刷刷变学霸
举一反三
【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
【单选题】现有催产草亲鱼12组，预计每尾雌鱼平均重6公斤，每尾雄鱼重5公斤，雄雌亲鱼的配组为1：2，计划每公斤雌草鱼的剂量为LRH-A10微克，雄鱼减半，加上5%的注射损耗，所需催产剂的总量为（）
A.
1071微克
B.
1386微克
C.
1050微克
D.
1350微克