【单选题】回答题: Natural Medicines Since earliest days, humans have used some kinds of medicines. We know this because humans have survived. Ancient treatments for injury and disease were successful enough to kee...
【简答题】阅读理解。 Some of my earliest childhood memories are of the beach-in the hot sun, building sandcastles, burying Dad in the sand. Now the coast has a strangely-pleasant and relaxing attraction. I look forw...
【简答题】In earliest times, men considered lightning to be one of the great mysteries of nature. Some ancient people believed that lightning and thunder were the weapons of the gods. In reality, lightning is a...