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单选题

The “tissue factories” in the second paragraph most probably refers to ______.

发布日期:2022-07-02

The “tissue factories” in the second paragraph mos...
A

the five genetically identical piglets.

B

places for the production of tissues.

C

animals whose organs would be used for human consumption.

D

animals which would be raised in quantity for transplant materials.

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全国英语等级考试(PETS)

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