下列配伍中，属于"十八反"的是
A．人参、五灵脂
B．人参、莱菔子
C．半夏、天南星
D．半夏、乌头
E．乌头、犀角
参考答案：D
. His efforts to persuade him to make a donation were ____ because he showed no intention to take a cent out of his pocket.
A．in place
B．in sight
C．in vain
D．in effect
号称我国“三大火炉”的是______．
