单项选择题 A1/A2型题：有关MRI的限度，说法错误的是（）。 A.体内带铁磁性物质的患者不能进行检查 B.进

题型：填空题

UPS的作用是（）和（）。

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题型：问答题

试用协议

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题型：问答题

（1）用图（a）所示的实验装置验证牛顿第二定律．

①完成平衡摩擦力的相关内容：

（i）取下砂桶，把木板不带滑轮的一端垫高，接通打点计时器电源，______（选填“静止释放”或“轻推”）小车，让小车拖着纸带运动．

（ii）如果打出的纸带如图（b）所示，则应______（选填“增大”或“减小”）木板的倾角，反复调节，直到纸带上打出的点迹______，平衡摩擦力才完成．

②某同学实验时得到如图（c）所示的a-F图象，则该同学验证的是：在______条件下，______成正比．

（2）某同学将完好的仪器连接成如图（d）所示电路（其中滑动变阻器的连线没有画出），用来探究小灯泡电阻与电压的关系．

①闭合开关进行实验时发现，无论怎样移动滑片P，电压表和电流表的示数都不为零，但始终没有变化．则该同学把滑动变阻器接入电路中的方式可能是______（填写选项代号）

a．G与C相连，F与H相连 b．G与C相连，D与H相连

c．G与E相连，F与H相连 d．G与E相连，D与H相连

②在图（d）中将滑动变阻器正确接入电路中．要求：灯泡两端的电压可以从零开始进行调节．

③在正确操作下，该同学得到灯丝两端电压U和对应电阻R的数据如下表：

（i）根据表中数据在坐标中描出R-U图线；（ii）根据图线，可以得到灯丝在未通电时的阻值约为______Ω．

U/V	1.0	2.0	3.0	4.0	6.0	8.0	10.0	12.0
R/Ω	2.1	3.0	3.8	4.4	5.2	5.6	5.9	6.0

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题型：完形填空

完形填空。
Most healthy children are ready to eat almost anything offered to them.A child doesn't often dislike food 1 it is badlycooked. The 2 a meal is cooked and served is the most important and serving meals 3 will often improve a child'sappetite (食欲). Never ask a child 4 he likes or dislikes afood and never 5 likes or dislikes before him or allow 6 else to do so. If the father says he hates meat or the motherrefuses vegetables in the child's hearing, he is 7 to copytheir words. It is important for parents to teach a child to like 8 and he probably 9 . Nothing healthful should be leftout from the meal because of a supposed 10 . At meal time itis a good 11 to give a child a small 12 and let him 13 back for a second helping rather than give him too 14 . Do not talk too much to the child 15 meal time,but let him geton with his food, and do not 16 him to leave the tableimmediately after a meal or he will 17 learn to eat his food tooquickly 18 he can hurry back to his toys. On 19 conditions (情况) must a child be coaxed (哄骗) to eat 20 forced to eat.
( )1. A. if ( )2. A. means ( )3. A. anxiously ( )4. A. whether ( )5. A. say ( )6. A. everybody ( )7. A. possible ( )8. A. something ( )9. A. should ( )10. A. dislike ( )11. A. point ( )12. A. breakfast ( )13. A. ask ( )14. A. much ( )15. A. on ( )16. A. agree ( )17. A. slow ( )18. A. so that ( )19. A. some ( )20. A. or	B. until B. road B. interestingly B. what B. tell B. anybody B. friendly B. nothing B. may B. taste B. custom B. lunch B. come B. little B. for B. allow B. soon B. until B. any B. nor	C. that C. way C. carefully C. that C. discuss C. somebody C. likely C. things C. will C. love C. idea C. supper C. return C. few C. by C. admit C. quick C. before C. such C. but	D. unless D. method D. easily D. which D. speak D. nobody D. sure D. everything D. must D. imagination D. plan D. share D. take D. many D. during D. advise D. early D. though D. no D. neither

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题型：单项选择题

大面积烧伤48h内最主要的全身改变指（）。

A.创伤性休克

B.低血容量休克

C.毒血症

D.创面脓毒症

E.急性肾功能衰竭

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有关MRI的限度，说法错误的是（）。 A.体内带铁磁性物质的患者不能进行检查 B.进

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