一投资者在两个投资方案中选择一个，这两个投资方案的利润x（万元）分别服从正态分布

晚上9时用24时计算法表示是______．

Among Asimov’s most famous works of science fiction, one ______he won an award, was the Foundation Trilogy.

A．of whom

B．of which

C．for whom

D．for which

口服利血平的降压作用特点是

A．起效慢，作用温和，持久，伴心率减慢
B．起效慢，作用温和，持久，伴心率增快
C．起效快，作用温和，持久，伴心率减慢
D．起效快，作用温和，持久，伴心率增快
E．起效慢，作用强，维持时间短，对心率 无影响

BGP is an inter-autonomous system routing protocol; it is designed to be used between multiple autonomous ( ) . BGP assumes that routing within an autonomous system is done by an intra-autonomous system routing protocol.BGP does not make any assumptions about intra-autonomous system （） protocols employed by the various autonomous systems. Specifically， BGP does not require all autonomous systems to run the same intra-autonomous system routing protocol.

BGP is a real inter-autonomous system routing protocol. It imposes no constraints on the underlying Internet topology. The information exchanged via BGP is sufficient to construct a graph of autonomous systems connectivity from which routing loops may be pruned and some routing ( ) decisions at the autonomous system level may be enforced.

The key feature of the protocol is the notion of Path Attributes. This feature provides BGP with flexibility and expandability. Path （） are partitioned into well-known and optional. The provision for optional attributes allows experimentation that may involve a group of BGP （） without affecting the rest of the Internet.   New optional attributes can be added to the protocol in much the same fashion as new options are added to the Telnet protocol， for instance.

BGP does not make any assumptions about intra-autonomous system （） protocols employed by the various autonomous systems.

A．routing 

B．switching

C．transmitting   

D．receiving

SOLAS/74公约专门从（）的角度出发。

A、人命安全

B、船体安全

C、防污染