利率上限实质上是以利率为对象的是（）。
A.期货交易
B.期权交易
C.掉期交易
D.套期保值交易
参考答案：B
11. —How soon can you finish the large picture?
—It will be two months ______.
A．since it has been finished
B．after it finishes
C．before it has finished
D．before it is finished
可增加脑内GABA含量抑制病灶放电扩散的药物是：
A．乙琥胺B．苯妥英钠C．卡马西平D．丙戊酸钠E．硫酸镁
