新生儿脑膜炎（）
A．头孢菌素
B．头孢他定
C．头孢拉定
D．头孢吡肟
E．头孢呋辛
参考答案：D
--- Jenny, ________do you visit your grandparents?
--- Twice a month.
A．How long
B．How soon
C．How often
D．How many
你发现油当箱位下降迅速，你如何处理？
