The rats fed unrestricted diets do NOT
A. have one preventing-aging protein increased.
B. have their cell death increased or doubled.
C. have their DNA fragmentation doubled.
D. have the levels of proteins increase
Passengers leaving for New York should be ready before
A. I6:38.
B. 17:09.
C. 18:30.
D. 19:45.
与血的生成关系最密切的脏腑是
A. 心
B. 肺
C. 脾
D. 肝
E. 肾
What does the woman mean
A. It is really nice to change it.
B. It has been used for a long time.
C. It is still in good condition.
D. It ought to be replace
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