题目: 按生产力高低排序,正确的答案是()。A.热带雨林>亚热带季雨林>北方针叶林>冻原B.开阔大洋>河口>湖泊>大陆架C.温带草原>稀树草原>常绿阔叶林>北方针叶林D.长江流域农田>黄河流域农田>黑龙江流域农田>热带雨林 答案: 参考答案:A
题型:选择题 The doctor is skilled at treating heart trouble and never accepts any gift from his patients, so he has a very good _____. [ ]A. expectationB. reputation C. contribution D. civilization 查看答案