治疗丹毒的首选内用药物是()
A．红霉素
B．青霉素
C．头孢菌素
D．灰黄霉素
参考答案：B
I don't know the teacher ________ is talking with Miss Wang. [ ]
A. what
B. whom
C. which
D. who
“出租车”车辆应按指定位置排队候客，不得乱停乱放或（）拉客。
