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完形填空。 These days computer games have become more and  more popular (普遍的)  in many cities and towns. A lot of small shops along busy l have changed into(改成)  computer game houses in order to  ( 为了 ) get more 2 . These places are always crowded with  people. In the computer game houses,people 3 a lot  of money matching on the machines.lt's 4 for  one to beat (战胜) a computer,but one can do well after  trying again and again. People want to 5 when  they play computer games. The more they 6 ,the  more they want to win,and at last they even can't 7 without it. The result is that some people don't want to 8 and they play in computer game houses for  hours and hours. For schoolboys,things are 9 .They don't want to have 10 . When school is  over, they rush to the computer game houses near  their 11 . Some of them can get enough money from their 12 .Some of them are not 13 enough  to get the money. So they have to steal or rob (盗窃或抢劫) others' and become 14 . Computer game addiction (上瘾) is a(n) 15 problem in our lives. Something has to be done to stop it. (     )1. A. streets (     )2. A. boys (     )3. A. take (     )4. A. possible (     )5. A. read (     )6. A. lose (     )7. A. come (     )8. A. watch TV (     )9. A. better (     )10. A. lessons (     )11. A. classes (     )12. A. classmates (     )13. A. lucky (     )14. A. good (     )15. A.important B. schools B. money B. spend B. easy B. learn B. try B. eat B. go out B. exciting B. games B. rooms B. teachers B. unlucky B. bad B. serious C. towns C. computers C. cost C. good C. win C. waste C. study C. stay there C. even worse C. families C. schools C. sisters C. careful C. rich C. unusual (不寻常的) D. cities D. houses D. pay D. hard D. download D. watch D. live D.work D. interesting D. sports D. shops D. parents D. polite D. poor D. wonderful
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【简答题】A.RNA聚合酶的α-亚基 B.RNA聚合酶的σ-因子 C.ρ-因子 D.RNA聚合酶的β-亚基 原核生物中能识别转录起始位点的是 A. B. C. D.
【单选题】能识别原核生物转录起始点的亚基是
A.
α
B.
β
C.
ρ
D.
σ
E.
β′
【简答题】由于生理、心理及各种光、形、色等因素的影响,人在视觉过程中,会产生视()等现象。
【单选题】原核生物RNA聚合酶中能识别转录起始点的是
A.
核心酶
B.
α亚基
C.
σ亚基
D.
ρ因子
E.
终止因子
【简答题】有多余约束的几何不变体系称为 结构。
【简答题】由于生理、心理及各种光、形、色等因素的影响,人在视觉过程中,会产生____等现象。
【简答题】根据我国法律规定,祖父母、外祖父母对孙子女、外孙子女有抚养义务的条件是(    )。 A.祖父母、外祖父母有负担能力 B.孙子女和外孙子女的父母已经死亡或无力抚养 C.孙子女和外孙子女的父母有负担能力却不抚养 D.孙子女和外孙子未成年
【判断题】良好的光环境主要是通过改善人的视觉条件(照明生理因素)和改善人的视觉环境(照明心理因素)来达到提高生产率的。
A.
正确
B.
错误
【单选题】祖父母、外祖父母抚养孙子女、外孙子女须具备的条件之一是 ( )
A.
任何孙子女、外孙子女都应该抚养
B.
孙子女和外孙子女未成年
C.
孙子女和外孙子女的父母虽有抚养能力但不愿抚养
D.
孙子女和外孙子女虽成年但缺乏劳动能力又缺乏生活来源
【判断题】σ因子能参与识别DNA模板上转录RNA的特殊起始点。
A.
正确
B.
错误
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