行权价格低于标的物市场价格的看涨期权是( )。
A．看跌期权
B．实值期权
C．虚值期权
D．平值期权
参考答案：B
The Internet gives students the chance to have the materials they need _________ to them quickly and cheaply.
A．to deliver
B．delivered
C．delivering
D．deliver
砂子是岩石风化后形成的。按产地可分为______；按平均粒径可分______和______。
