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问题 多项选择题

同一采区内、同一煤层上下相连的2个同一风路中的采煤工作面、采煤工作面与其相连接的掘进工作面、相邻的2个掘进工作面串联通风必须同时符合下列哪些规定：（）。

A.布置独立通风有困难

B.必须制定安全措施

C.串联通风的次数不得超过1次

D.串连通风的次数不得超过两次

答案

参考答案：A, B, C

单项选择题 A1/A2型题

在现代，心理学被定义为（）。

A.对心理活动的研究

B.研究心理生活的科学

C.关于行为的科学研究

D.对生物与外部世界接触中的行为的科学研究

E.研究行为和心理过程的科学
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单项选择题

Most IP layer-based proxy mechanisms, such as network address translation (NAT), only support uni-directional proxy, from the internal network to external network (the Internet). The proxy establishes the communication channel by (86) IP addresses. The IP addresses must be (87) . These proxy mechanisms prevent applications that must establish return data channels from establishing their data channels, such as, multimedia applications. IP layer-based proxy mechanisms need additional software (88) for each application that uses (89) channels. SOCKS identifies communication targets through domain names, overcoming the restriction of using private IP addresses. SOCKS can use domain names to establish communication between separate LANs, with (90) IP addresses.

（90）是（）

A.duplicating

B.crossing

C.overlapping

D.repeating
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