28. When you are home, give a call to let me know you _________safely.
A. are arriving B. have arrived C. had arrived D. will arrive
27. Mrs. White showed her student some old maps _________from the library.
A. to borrow B. to be borrowed C. borrowed D. borrowing
26. I have seldom seen my mother ________ pleased with my progress as she is now.
A. So B. very C. too D. rather
25. Mary made coffee ________ her guests were finishing their meal.
A. so that B although C. while D. as if
24. As a child, Jack studied in a village school, ___ in named after his grandfather.
A. which B. Where C. What D. that
23. I’ll spend half of my holiday practicing English and ___ half learning drawing.
A. another B. the other C. other’s D. other
22. the workers _____ the glasses and marked on each box “this side up”
A. carried B. delivered C. pressed D. packed
1.全国I
21-----Have you finished reading Jane Eyre?
-----No, I_________ my homework all day yesterday.
A. was doing B. would do C. had done D. do
23. 2010年温哥华冬奥会女子冰壶队为我国夺得历史上第一枚冬奥会集体项目奖牌。图18是我国选手冬运会女子冰壶比赛中的一个场景,比赛时两名队员在冰壶前方“刷冰”,通过做功的方式改变冰的内能,使表面的冰熔化成薄薄的一层水,使干摩擦变湿摩擦;这样就能减小冰壶与冰面之间的摩擦,使冰壶按照运动员预计的运动快慢和方向运动。
(1)给你一块玻璃板,水,带钩的小木块,弹簧测力计。请你验证湿摩擦力小于干摩擦力,写出实验方法。
(2)为了提醒司机朋友在雨天里注意行车安全,在高速公路旁设置了“雨天路滑,减速慢行”的警示牌,是因为下雨天汽车所受的刹车阻力较 ,在相同车速的情况下,汽车的速度减小得更 ,刹车后滑行距离更 ,所以为安全起见要减速慢行。
2010年澄海区初中毕业生学业考试
22.随着人们生活水平的提高,电冰箱已进入了千家万户。
(1)电冰箱使用三脚插头与电源插座连接,如图17所示。细心观察可以发现,三脚插头中与用电器金属外壳连接的那个插脚比另外两个插脚要稍长。这样的设计主要考虑下列哪一因素( )
A、使插头的造型更美观
B、插入插座中可更稳固
C、有利于识别火线和零线插脚
D、插入插座时,可确保用电器外壳先接地
(2)冰箱门的密封条采用磁性材料,利用 磁极相互
吸引来增强它的密封性能。
(3)冰箱的压缩机是一台电动机,它是根据通电线圈在 中受力转动的原理制成的,工作时把 能转化为 能。
(4)提出一项使用冰箱时的节能措施
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