风险的大小由未来可能收益率与期望收益率的偏离程度来反映。( )
参考答案：对
解析： 略
If you are feeling stressed, you should_____. [ ]
A. shout at your friends
B. share your problems with friends
C. quarrel with your friends
D. blame your parents
针对东北黑土地水土流失严重、土壤肥力下降等现象，应采取哪些解决措施?
