地产市场的核心是( )。
A．基准地价
B．地价
C．土地使用价值
D．土地收益
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．TCP
B．ISP
C．FTP
D．IIS
食品生产经营人员的体检周期为（）
A.一年一次
B.二年一次
C.可以不体检
