If you make the decision to quit, the cilia in your lungs are one of the first parts of your body to heal. These hair-like projections wave back and forth like a brush as air moves in and out of your lungs. They help your body...
Well, we weren't as smart as we thought we were. As we started using antibiotics everywhere -- in hospitals, to treat and prevent; at home, for simple colds; on farms, to keep animals healthy -- the bacteria evolved. In theonslaughtof antibiotics ...
头部、颈部、躯干、左右上肢、左右下肢一般认为，一个人50岁和他30岁时相比，运动和身体协调能力显著减退。最近的一项调查显示，50岁的人和30岁的年轻人在踢毽子时所表现出的运动和身体协调能力没有明显差别。因此，认为一个人到了50岁运动和身体协调能力会显著减退的看法是站不住脚的。 以下哪项如果为真，最能...
A. common colds are more severe than other plagues B. viruses are the factors causing common colds C. common colds are full of myth D. the idea that cold leads to colds doesn’t stand up 查看完整题目与答案 Passage 2 Come on--Everybody's doing it. Thatwhispered message, hal...