为了在Internet上浏览网页，需要在客户端安装浏览器。不属于浏览器软件的是 (6

Routing protocols use different techniques for assigning (71) to individual networks. Further, each routing protocol forms a metric aggregation in a different way. Most routing protocols can use multiple paths if the paths have an equal (72) Some routing protocols can even use multiple paths when paths have an unequal cost. In either case, load (73) can improve overall allocation of network bandwidth. When multiple paths are used, there are several ways to distribute the packets. The two most common mechanisms are per-packet load balancing and per-destination load balancing. Per-packet load balancing distributes the (74) across the possible routes in a manner proportional to the route metrics. Per-destination load balancing distributes packets across the possible routes based on (75)

A．user

B．distance

C．entity

D．cost

为了制定一个合乎中国国情和时代特点的《国家中长期教育改革和发展规划纲要（2010—2020年）》（简称《纲要》），政府有关部门通过专题调研、网上征集意见、召开座谈会等形式广纳群言、广集众智。我国政府制定《纲要》做到了[ ]

A、审慎用权，科学民主决策

B、科学执政，民主执政，依法执政

C、依法执政，行使国家立法权

D、保障人民直接行使国家权力

如有明确左房血栓，可选择的最适宜的治疗手段是

A．药物除房颤

B．二尖瓣球囊扩张术

C．二尖瓣机械瓣置换术

D．二尖瓣闭式扩张术

E．二尖瓣生物瓣置换术

《阿拉木汗》是首（）民歌。

A.维吾尔族

B.蒙古族

C.哈萨克族

D.藏族

老舍的《四世同堂》描述了我国传统的家族制度。如今，现代意义的核心家庭已逐步取代了传统的家族制度，日益成为社会的基本细胞。造成这种变化的原因不包括（）

A.法律的规定

B.伦理道德观变化

C.经济的发展

D.封建制度的崩溃