电力电线长期过载运行，其后果是什么？

在括号里写出画线词语的近义词或反义词。

1．写近义词。  

(1)渔夫皱起眉，他的脸变得严肃、忧虑。    (    )  

(2)成功是对自己最好的鼓励。    (    )  

(3)你规定良好的生活习惯，要求人们对过度行为引起警惕。    (    )

2．写反义词。 

(1)输球的原因，当然是多方面的，但自己与主攻手配合失调是一个不可饶恕的过失。    (    )  

(2) 一天黄昏，北风呼呼地怒号着，天色十分阴暗。    (    )  

(3)夜莺的歌声打破了夏日的沉寂。    (    )

在下列混凝土的技术性能中，正确的是

A.抗剪强度大于抗压强度  

B.轴心抗压强度小于立方体抗压强度 

C.混凝土不受力时内部无裂缝  

D.徐变对混凝土有害无利

染色体主要由______和______组成。

纵波垂直入射至尼龙/空气大平界面上的声压反射率为（）。

A、100%

B、95%

C、25%

D、39%

The Border Gateway Protocol (BGP) is an interautonomous system (76) protocol. The primary function of a BGP speaking system is to exchange network (77) information with other BGP system. This network reachability information includes information on the list of Autonomous System (ASs) that reachability information traverses. BGP-4 provides a new set of mechanisms for supporting (78) interdomain routing. These mechanisms include support for advertising an IP (79) and eliminate the concept of network class within BGR BGP-4 also introduces mechanisms that allow aggregation of routes, including. (80) of AS paths. These changes provide support for the proposed supernettting scheme.

（76）是（）

A.secubility

B.reachability

C.capability

D.reliability