二乙基醚
参考答案：22 (2909.1100)
At the conference, people of different _______ were given a chance to exchange theirs with each other.
A．points
B．manners
C．views
D．ways
如果股票市场价格处于震荡、波动状态之中，恒定混合策略劣于买入并持有策略 （ ）
