6. I think your advice is of great _____ to me and it’s ____.
A. valuable, worth giving B. valuable, worth taking it
C. value, worth giving it D. value, worth taking
5. --- It’s so helpful him to spend as much time as he can people in need.
--- Yes, you are right.
A. for, in helping B. of, help C. of, helping D. for, help
4. In our study, the ____ we work, ____ mistakes we’ll make.
A. more hardly, the less B. harder, the less
C. more hardly, the fewer D. harder, the fewer
3. --- Do you know this 3G mobile phone belongs to?
--- Let me see. Oh, it’s .
A. Whose, mine B. Who, me C. Who, mine D. Whose, me
2. --- Excuse me. When can we play badminton at the court?
--- Not until it next week.
A. repairs B. will repair C. is repaired D. will be repaired
从A、B、C、D四个选项中选出一个最佳选项,填在题前括号。
1. ---Have you watched charity show for the earthquake in Yushu?
-- Yes. What great fun it is!
A. the, a B. the, / C. a, / D. the, the
25.(1) ;
(2) ;
(3) ;(4)
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;(3)①右图;
② ,③ ,④ ,
28.
(7分)电热水壶是家庭常用的电热器.小东同学想
通过实验知道一只铭牌是“220V 1500W”电热水
壶的效率.他在该壶中装入2.5kg的水后,将其接入
家庭电路并正常工作,在烧水过程中他记录下了不
同时刻水的温度,并绘制出“温度-时间”图像,如
图所示.请回答:
(1)在AB、BC、CD三段过程中,水温上升最快的是哪
一段?
|
(3)该电热水壶烧开这壶水(即从A至C的过程中)的效率;(C水=4.2×103J/kg·℃)
(4)为了提高热水壶的效率,请你提出一条合理化的建议.
泰州市二中附中2010年中考适应性训练
物 理 试 题 答 题 纸 2010.6.3
(考试时间:100分钟 满分:100分)
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特别提醒:请同学们把答案按要求填写在答题纸上规定黑色矩形区域内,超出答题纸区域的答案无效!考试结束只收答题卡和答题纸,不收试卷. |
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0.2A,电压表示数
为4V.求:
(1)电源电压;
(2)R2的阻值.
27.
(4分)如图所示电路中,R1=10Ω.当开关S闭合时,电流表示数为
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