材料的电阻率和导电率的关系是（）。A.成正比 B.成反比 C.无关系 D.相等

一、根据下面的文字材料回答第116题～第120题。

据北京市统计，截止到1981年底，全市16岁以下的少年儿童总数为2272194人。其中，学龄前儿童739616人，占其总数的33.55%。另据有关统计资料，在我国目前抚养一个婴儿到16岁，农村平均需要1600元，城市平均需要6900元，全国平均2200元。1981年北京市儿童消费主要体现在吃、穿、玩具等。不同年龄消费费用不同。在婴儿期内食品支出占支出总额的81.5%；在幼儿期内占 81.2%；在学龄前期占77.9%；在学龄期内占71.4%。在服装方面，学龄前儿童支出大体维持在总消费金额的13%左右，但进入学龄期后，占总体的21.8%。

在我国，城市抚养一个婴儿的费用相当于农村抚养一个婴儿的（）。

A．3倍左右

B．4倍左右

C．5倍左右

D．2倍左右

Steve Robinson went for a walk yesterday morning with tens of millions of people watching. A walk in space. What made his

sojourn

so different from those of the hundreds of other astronauts who have floated around shuttles for more than 20 years is that the very future of the nation’s manned space program may rest on his success.
In the wake of the Columbia disaster 30 months ago, and amid questions about NASA’s commitment to a safety-first culture, Robinson tested what accounts to the repair kits to help astronauts survive damage from debris during lift-off or in orbit. Apparently, the repairs went well.
How well, however, and whether the spacecraft sustained damage from foam insulation as it rose from Kennedy Space Center, won’t be known until Discovery completes its super-heated descent through the atmosphere and touches down.
What is known now is that NASA allowed Discovery to fly despite internal questions about whether NASA had done enough to address safety issues raised inside and outside the agency. That’s disquieting. Space flight is dangerous; it can never be as safe as, say, a flight in a jetliner. But every investigation following both the Challenger and Columbia tragedies cited a culture that did not put safety first.
Yes, NASA has made progress. Robinson’s repair walk is evidence of that. For now, let’s hope for the best for the seven brave astronauts as, amazingly, they do their jobs.

Which of the following is NOT cited by the author in his criticism of NASA’s neglect of safety

A．NASA’s allowing Discovery to fly in spite of questions about safety.

B．Launching the spacecraft from Kennedy Space Center.

C．The Columbia disaster 30 months ago．

D．The explosion of Challenger．

根据行政复议法及相关规定，对有下列哪些情形的具体行政行为，行政复议机关可以决定撤销、变更或者确认其违法

A．主要事实不清、证据不足的

B．违反法定程序的

C．滥用职权的

D．具体行政行为明显不当的

新鲜出血的CT值为（）

A.20～40HU

B.30～50HU

C.40～60HU

D.50～70HU

E.60～80HU

中国联通客户服务中心后台类岗位人员要确保前台客服代表按照（）的要求同客户接触。

A.业务流程

B.业务规范

C.数据采集

D.报表分析

E.服务标准