The passage implies that medicine in an osmotic pump pill will leave the pill when ______.

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The passage implies that medicine in an osmotic pump pill will leave the pill when ______.

A.the pill is swallowed

B.the medicine is dissolved with water from the body

C.enough pressure builds up in the pill

D.the cellulose coating is dissolved

参考答案:

C解析:从最后一段的后两句可以看出答案。注意pump一词是与 pressure对应的。