以下药物配伍属于"相须"的是（）
A.麻黄与黄芩
B.党参与黄芪
C.生姜与黄芩
D.半夏与生姜
E.人参与莱菔子
参考答案：B
Saddam and his followers ______ from Baghdad before the air raids took place. [ ]
A. had escaped
B. has escaped
C. was escaping
D. escape
次级点火波形点火线延长和火花线缩短的原因是（）。
A．可燃混合气稀
B．可燃混合气浓
C．进气系统堵塞
