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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. making unusual sounds
E.
D. making special movements
【单选题】药物在生物膜一侧形成离子障时，说明 ：
A.
离子型药物易跨膜，不易留在膜一侧
B.
非离子型药物易跨膜，离子型药物不易跨膜
C.
离子型和非离子型药物都易跨膜
D.
离子型和非离子型药物都不易跨膜
E.
非离子型药物不易跨膜，易留在膜一侧