题目内容

A．More running clubs and more books about running appear.B．Interest in improving the fi

A. More running clubs and more books about running appear.
B. Interest in improving the fitness of human body is dropping.
C. The number of heart-attack patients is decreasing.
D. More people begin to take active jobs.

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A. Gardening and landscaping.
B. Retailing.
C. Financing.
D. Child-care.

A. Those who have heart attacks.
B. Those who desire to lose weight.
C. Those who have spare time.
D. Those who have inactive jobs.

A. 证明软件系统中存在错误
B. 判定软件是否合格
C. 证明软件的正确性
D. 尽可能多地发现软件系统中地错误

A. 255.255.255.224
B. 255.255.255.240
C. 255.255.255.248
D. 255.255.255.252