基站射频部分功率过小，会严重影响基站的()。A.拥塞程度 B.覆盖范围 C.网络负荷

吸声性属于材料的（）。

A、基本物理性质

B、基本力学性质

C、基本光学性质

D、其他性质

2010年1月11日，中 * * 、国务院隆重举行国家科学技术奖励大会，在这场国家科技领域最高级别盛会中，我省收获空前：2009年全国评出的282项科技进步奖中，我省获25项（其中通用项目20项，专用项目5项），包括一项科技进步奖特等奖（全国共3项），3项科技进步一等奖（全国共17项），21项科技进步二等奖。这是近年来我省加快建设创新型河南，着力构建自主创新体系等一系列战略所取得的标志性成果。

作为河南的青少年更应该积极投身于创新型河南的洪流中。

（1）假设你校将召开一次“做创新型中学生”的动员大会，请你做动员发言，你会用到思想品德课的哪些知识？

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（2）你准备如何提高自身的创新能力？

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（3）当你有了“小发明”时，你将如何保护自己的成果？

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Shopping habits in the United States have changed greatly in the last quarter of the 20th century. 1 in the 1900s most American towns and cities had a Main Street.Main Street was always in the heart of a town.This street was 2 on both sides with many 3 businesses.Here, shoppers walked into stores to look at all sorts of merchandise: clothing,furniture,hardware,groceries. 4 ,some shops offered 5 .These shops included drugstores, restaurants, shoerepair stores, and barber or hairdressing shops. 6 in the 1950s, a change began to 7 .Too many automobiles had crowded into Main Street 8 too few parking places were 9 shoppers.Because the streets were crowded, merchants began to look with interest at the open spaces 10 the city limits.Open space is what their cardriving customers needed.And open space is what they got 11 the first shopping centre was built.Shopping centres, or rather malls, 12 as a collection of small new stores 13 crowded city centres. 14 by hundreds of free parking space, customers were drawn away from 15 areas to outlying malls.And the growing 16 of shopping centres led 17 to the building of bigger and betterstocked stores. 18 the late 1970s,many shopping malls had almost developed into small cities themselves.In addition to providing the 19 of onestop shopping, malls were transformed into landscaped parks, 20 benches,fountains,and outdoor entertainment.

1.A.As early as B.Early C.Early as D.Earlier

2.A.built B.designed C.intented D.lined

3.A.varied B.various C.sorted D.mixed up

4.A.Apart from B.However C.In addition D.As well

5.A.medical care B.food C.cosmetics D.services

6.A.suddenly B.Abruptly C.Contrarily D.But

7.A.be taking place B.take placeC.be taken place D.have taken place

8.A.while B.yet C.though D.and then

9.A.available for B.available to C.used by D.ready for

10.A.over B.from C.out of D.outside

11.A.when B.while C.since D.then

12.A.started B.founded C.set up D.organized

13.A.out of B.away from C.next to D.near

14.A.Attracted B.Surprised C.Delighted D.Enjoyed

15.A.inner B.central C.shopping D.downtown

16.A.distinction B.fame C.popularity D.liking

17.A.on B.in turn C.by turns D.further

18.A.By B.During C.In D.Towards

19.A.cheapness B.readiness C.convenience D.handiness

20.A.because of B.and C.with D.provided

目前账户贵金属交易品种有哪些？（）

A.人民币黄金、美元黄金

B.人民币白银、美元白银

C.人民币黄金与白银

D.美元黄金与白银、人民币黄金与白银