课时规范训练(单独成册)

　　训练(十九)

　　Ⅰ.阅读理解(共两节)

　　第一节　阅读下列短文，从每题所给的四个选项(A、B、C、D)中，选出最佳选项。

　　For centuries，medical pioneers have refined a variety of methods and medicines to treat sickness，injury，and disability，enabling people to live longer and healthier lives.

　　“A salamander (a small lizard­like animal) can grow back its leg.Why can’t a human do the same？” asked Peruvian­born surgeon Dr.Anthony Atala in a recent interview.The question，a reference to work aiming to grow new limbs for wounded soldiers，captures the inventive spirit of regenerative medicine.This innovative field seeks to provide patients with replacement body parts.

　　These parts are not made of steel；they are the real things—living cells，tissue，and even organs.

　　Regenerative medicine is still mostly experimental，with clinical applications limited to procedures such as growing sheets of skin on burns and wounds.One of its most significant advances took place in 1999，when a research group at North Carolina’s Wake Forest Institute for Regenerative Medicine conducted a successful organ replacement with a laboratory­grown bladder.Since then，the team，led by Dr.Atala，has continued to generate a variety of other tissues and organs—from kidneys to ears.

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