题目

There are 3000 workers in the company, with young women from the country ______ the largest part. A. playing                   B. making up         C. doing up                        D．performing 答案：B森林是生物圈能量流动的主体，原因是A.固定的太阳能总量大B.面积广阔C.生产力高D.固定的太阳能比例高