人类进入资本市场至今，产生过的营销观念有生产观念、推销观念、市场营销观念、社会营销观念和大市场营销观念
参考答案：错
— The boss said we had only three days to finish the work.
— Don't worry. We have already _____ two thirds of it. [ ]
A. got down
B. got through
C. given in
D. given away
读某地等高线地形图（等高距：100m），回答问题。
图中等高线X的数值是（）
A.200m
B.300m
C.400m
D.500m
