清末的上海，“无论其为官为商为士为民，但得稍有赢余，即莫不竟以衣服炫耀为务，即下

I don’t know who invented _____digital camera, and it’s really _____ most useful invention.

A．the; a

B．the; the

C．a; a

D．不填；不填

使用抗干扰扼流圈是在各种抗干扰措施中是治本的措施。

Communication protocols are (66) connection-oriented or connectionless, (67) whether the sender of a message needs to contact and maintain a dialog with the recipient or (68) send a message without any, prior connect and with the hope that the recipient receives everything. (69) .These methods (70) the two ways that communication is implemented on networks.

A．fulled

B．flooded

C．depending on

D．defined by

对物业管理常见的紧急事件，不仅要准备预案，而且针对同一类型的事件要制定（）以上预选方案。

A.1个

B.2个

C.3个

D.4个

世界上邪教组织影响比较大有（）

①美国的“太阳圣殿教”

②日本的“奥姆真理教”

③法国“人民圣殿教”

④中国的“法轮功”

A.②④

B.①②

C.①②③

D.①②③④