期货交易中套期保值的基本类型有( )。
A．多头套期保值
B．空头套期保值
C．交叉套期保值
D．平行套期保值
参考答案：A,B
If we learn to appreciate _____ is new and different, we will be well-prepared for ____ the future may have in store.
A．that; whatever
B．what; whatever
C．that; whichever
D．which ; that
治疗外科跌打损伤瘀血肿痛，首选的药组是（）
A.郁金、石菖蒲
B.乳香、没药
C.穿山甲、王不留行
D.益母草、泽兰
E.水蛭、虻虫
