题目内容

Backpacks with wide， padded straps and a belt can help to avoid problems of sprains and strains. 查看材料

A. Right
B. Wrong
C. Not mentioned

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Children should put all the books in their locker. 查看材料

A. Right
B. Wrong
C. Not mentioned

Roller bags tend to be heavier than ordinary backpacks.

A. Right
B. Wrong
C. Not mentioned

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肥胖症的治疗为什么要采取饮食控制和运动疗法相结合？