Traditional Chinese medicine (TCM) is a medical system that has collected and summarized abundant clinical experience over its long history of more than 2000 ye
1.Introduction The availability of reliable information describing our natural and anthropogenic environment—and its changes in particular—is crucial for unde
阅读下面短文, 从短文后各题所给的A、B、C和D四个选项中, 选出可以填入空白处的最佳选项。 There was once a widow who had two daughters. The bad-tempered(脾气暴躁的) widow loved the elder who was like herself both in 41 and personality, but didn’t