This passage is mainly about the relationship between___________
A. food and health
B. sleep and weight
C. weight and exercise
D. exercise and equipment
进行理化检验样品抽样时，样品应具有哪些特性
A. 代表性和公证性
B. 准确性和代表性
C. 可行性和准确性
D. 先进性和科学性
E. 实用性和先进性
How long do normal mice live according to the passage？
A. about one year
B. about a year and a half
C. about two years
D. about three years
What can we learn from the experiment？
A. daily amount of food may influence our health
B. less exercise may make us live longer
C. sleeping may have nothing to do with weight
D. playing with others may help us sleep better.
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