金融衍生交易市场主流交易方式（）.
参考答案：套期保值
用手动研磨机研磨咖啡粉时，要求速度（）
A、越快越好
B、越慢越好
C、保持匀速
D、先快后慢
The government _______ a committee to deal with the accident which happened there two days ago.
A. appreciated
B. appointed
C. appraised
D. applied
