鼻咽癌调强放射治疗中CTV1一般定义为（）。 A.淋巴结引流区 B.低危区 C.高危

下列说法有误的一项是（ ）

A．《中国人失掉自信力了吗》是一篇驳论文，用驳论证的方法直接批驳，又用正面立论的方法间接批驳，从而彻底驳倒对方的谬论。

B．《陈涉世家》节选自编年体通史《史记》，作者是西汉史学家、文学家司马迁，全书共一百三十篇。

C．词又称“长短句”，句式长短不一。兴盛于宋代，苏轼和辛弃疾是豪放派的代表人物，而李清照可以说是婉约派的代表。

D．小说以塑造人物形象为中心，通过完整的故事情节的叙述和典型环境的描写来反映社会生活。

下面关于二叉排序树叙述中，正确的是

A．右结点的度大于左结点的度

B．右子树的度大于左子树的度

C．左子树中所有的结点的关键码值都小于该结点的关键码值

D．右子树中所有的结点的关键码值都小于该结点的关键码值

One of the most widely used routing protocols in IP networks is the Routing Information Protocol (RIP). RIP is the canonical example of a routing protocol built on the______(71) algorithm. Routing protocols in internetworks differ slightly from the idealized graph model. In an internetwork, the goal of the routers to forward packets to various_______ (72). Routers running RIP send their advertisement about cost every________(73) seconds. A router also sends an update message whenever an update from another router causes it to change its routing table. It is possible to use a range of different metrics or costs for the links in a routing protocol. RIP takes the simplest approach, with all link costs being equal _______(74). Thus it always tries to find the minimum hop route. Valid distances are 1 through_________(75) ,This also limits RIP to running on fairly small networks.

空白处____（74）应选择（）

A.1 

B.15 

C.16 

D.lengthofthelink

春季融雪期计划烧除也称作（）。

A.跟雨点烧

B.跟雪点烧

C.跟霜点烧

D.跟草点烧

氟利昂：臭氧层空洞

A．梅花：梅雨季节

B．雷暴：海啸

C．二氧化碳：温室效应

D．固体废物：厄尔尼诺