继发性闭经是指月经停止（）
A.至少2个月
B.至少6个月
C.至少10个月
D.至少1年
E.至少18个月
参考答案：B
In enterprises, the gateway is the computer that (67) the traffic from a workstation to the outside network that is serving the Web pages. In homes, the gateway is the (68) that connects the user to the internet.
A．finds
B．searches
C．routes
D．tracks
《浙江省医疗器械经营企业检查验收标准》适用范围？（）
①开办审查②变更许可事项审查
③换发许可证审查④日常监督检查
A、①②③④
B、②③④
C、③④
D、①②③
