附子强心作用的有效成分是( )
A．挥发油B．乌头碱C．去甲乌药碱D．中乌头碱E．次乌头碱
参考答案：C
—Could I use your computer, Susan?
—Sorry, I’m going to _______ it now. You can use it tomorrow.
A．work out
B．work in
C．work on
D．work for
在多数场合下，经常争吵的人可能属于偏执型人格障碍。
