一般适用于工业及民用住宅建筑物的内墙面装饰和养护，对于地下建筑工程和山下洞库的防潮效

23÷（　　）=（　　）…5，括号里的数共有______种填法．

以下是《中国药品通用名称》英文缩写的是

A．CDAN

B．CADN

C．CMAN

D．CAMN

E．CDMN

The new China was founded in 1949, ______ great changes have taken place.

A．since when

B．after which

C．in which

D．when

只封禁一台IP地址为203.168.47.59主机的access-list的正确配置是______。

A．access-list 110 permit ip any any
access-list 110 deny ip host 203.168.47.59 any
access-list 110 denyip any host 203.168.47.59
B．access-list 110 deny ip host 203.168.47.59 any
access-list 110 deny ip any host 203.168.47.59
access-list 110 permit ip any any
C．access-list 110 denyiphost 203.168.47.59 any
access-list 110 deny ip any host 203.168.47.59
D．access-list 110 deny ip host 203.168.47.59 any
access-list 110 permit ip any any
access-list 110 deny ip any host 203.168.47.59

我国的主要成煤期有4个，晚碳世——早二叠世，（），侏罗纪和第三纪。