外购整体网络服务的方式主要有两种：（）、（）。
参考答案：虚拟主机、主机或服务器托管
I don't like those big cities which have got ____ people and ____ traffic. [ ]
A. too much; too many
B. many too; too much
C. too many; too much
D. too many; much too
属于氨基糖苷类抗生素的是
A．头孢氨苄B．硫酸阿米卡星C．氯霉素D．头孢唑林E．琥乙红霉素
