【简答题】Walking is the exercise of choice for most dieters. You don't need a gym membership to do this effective exercise. Here's how to prepare: The only equipment you really need is a decent pair of walking...
【简答题】American this year will swallow 15, 000 tons drugs of aspirin, one of safest and most effective invented by man. 【M1】______ The most popular medicines in the world today, it is an el- 【M2】______ fecti...