一级企业可承担单项合同额不超过企业注册资本金（）倍的各种类型水利水电工程及辅助生产设施的建筑、安装和基础工程的施工。A3.0B5.0C7.0D10.0

根据《水利工程建设项目招标投标管理规定》（水利部令第14号），招标人与中标人签订合同后至多（）内，应当退还投标保证金。A5日B5个工作日C7日D7个工作日

汉族的迁移是因为边地民族的内侵，一般有“五胡”之说，指的是（）A匈奴B吐蕃C鲜卑D羯E羌

察举制中，有很多科目，其中最重要的是（）A孝廉B茂才C贤良方正文学D明经E明法

新石器时代结束于距今（）A8000年B6000年C4000年D2000年

明洪武二十三年，朱元璋为建造一支海军船队，在南京周围种植的树有（）A梧桐树B桑树C枣树D漆树E棕榈树

最南的云贵高原，崇山峻岭，地势复杂，是古代所谓（）的居住地A南夷B西蛮C西南夷D南蛮

LED technology is widely used in various fields all over the world.（）ATrueBFalseCNot Given

材料全屏 Computer Mouse【*】The basic computer mouse is an amazingly clever invention with a relatively simple design that all

What can we infer from the passage about the author?AHe is resistant to social changes.BHe is against technological prog

Why does the author choose to write about what’s happening to the wallet?AIt represents a change in the modem world.BIt

What effect do the mountains have on winds?（）AMake them dry.BMake them wet.CMake them cool.DMake them weak.

The 4. 3-magnitude quake struck at 8: 19 p. m. in England and was centered under the English Channel.（）ATrueBFalseCNot G

Michael Jackson—the Ups and Downs【*】Michael Jackson, the seventh of nine children, started his musical career with his

Paragraph 5（）A​​​​​​​​​​​​​​EducationB​​​​​​​​​​​​​​Land and ClimateCState SystemDGeneral IntroductionEEconomyFPopulatio

Which of the following is true of the fossil deposits discussed in the passage?_____AThey include examples of newly disc

著名的“霍桑实验”属于实验性观察。A正确B错误

一般的，样本所含个体越多，分布又均匀，代表性就高，抽样误差就小；反之，则代表性低，抽样误差大。A正确B错误

物价上涨、失业率、每万人犯罪率等指标是（）A肯定性指标B否定性指标C中性指标D正指标

（）是社会事物状态的集中表现与反映。A社会现象B社会调查C管理理论D调查研究