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【单选题】

在老年病学研究中，（）。

A.
必须选用SPF以上级别的大鼠，并严格控制环境条件。
B.
饲喂三黧豆素可引起大鼠形成弹性蛋白老化的动物模型。
C.
限制大鼠食量每天给以7成量的食物，可缩短大鼠寿命。
D.
大鼠不能得到足够量的血样进行衰老的激素水平研究。
题目标签：老年病学
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A.
必须选用SPF以上级别的大鼠，并严格控制环境条件。
B.
饲喂三黧豆素可引起大鼠形成弹性蛋白老化的动物模型。
C.
限制大鼠食量每天给以7成量的食物，可缩短大鼠寿命。
D.
大鼠不能得到足够量的血样进行衰老的激素水平研究。
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