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1、 初中知识形物代名物代练习题 同义句转化 1. Is this your eraser? 2. Is this your sharpener? 3. Whose textbook is this? 4. Is that your cat? 5. Is that your dog? 6. Whose zebra is that? 7. Is this his coat? 8. Is that his jacket? 9. Whose mask is that? 10. Is that her box? 11. Is that her watch? 12. Whose camera is that
2、? 13. Whose ice cream is this? 14. Is this Peters pizza? 15. Is that Peters ice cream? 16. Whose spoon is this? 17. Are these Kates dolls? 18. Whose balloons are these? 一用括号中单词的适当形式填空 1-Are these_ pencils？ -Yes ,they are_. 2. Whose pencil is this ?Its_. 3.She is_ friend. 照顾)_ brother. 5.Are these_ b
3、ags ？ -No, they arent _. They are_ .bike is my sisters . It is_. 7.This isnt_ book . _ is in the bag. 8He is_ English teacher. _ name is Sam . 9._ dog is white .But_ is black. 10. - Look ! Whose car is it ?Is it_ ? - No,_ car is old . - Its_car . 二选择 1. This is my book. are over there. A. YourB. You
4、rsC. YouD. Mine 2. Whose pen is it? Its pen. A. her B. hers C. sheD. his 3. bag is new andis new, too. A. Our, he B. Ours, his C. My, his D. My, her 4. This room is ours, and that one is . A. they B. them C. theirsD. their 5. Whose pencils are there?Theyre A. my B. meC. mine D. our 6. Is the new wat
5、ch ? Yes, its. A. you, meB. yours, mineC. your, myD. your, mine 7. Whose shoes are these? They are . A. me B. mine C. my D. I 8. She is a student , name is Han Mei. A. its B. her C. hersD. his 9. Its a dog. I dont know name. A. its B. its C. it D. its 10. This ruler isnt mine. I think it is . A. he
6、B. him C. his D. her schoolbag is beautiful. But is more beautiful. A. Jims, my B. Jims, mine C. Jims, meD. Jims, I 12. am a boy andis a girl. A. My, she B. I, her C. I, she D. Mine, she 13.I like new dress. A. SheB. her C. hers D. his mother dohousework。 A. me, she B. mine, her C. my, her D. I, her
7、s 15.Is that hat? No, its not. A. your, my, TomsB. you, mine, Toms C. yours, mine, Tom D. your, mine, Toms 三 用所给词的适当形式填空。 1. That is not _ kite. That kite is very small, but _ is very big. 2. The dress is _. Give it to _. 3. Is this _ watch? No, its not _ . 4. _ is my brother. _ name is Jack. Look!
8、Those stamps are _. 5. _ dresses are red. What colour are _? 6. Here are many dolls, which one is _ ? 7. I can find my toy, but wheres _? 8. Show _ your kite, OK? 9. I have a beautiful cat. _name is Mimi. These cakes are _. 10. Are these _ tickets? No, _ are not _. _ arent here. 11. Shall _ have a l
9、ook at that classroom? That is _ classroom. 12. _ is my aunt. Do you know_ job? _ a nurse. 13. That is not _ camera. _is at home. 14. Where are _? I cant find _. Lets call _ parents. 15. Dont touch _. _ not a cat, _ a tiger! 16. _ sister is ill. Please go and get _. 17. _ dont know her name. Would y
10、ou please tell _. 18. So many dogs. Lets count _. 19. I have a lovely brother. _ is only. I like _ very much. 20. May I sit beside _? 21. Look at that desk. Those book are on _. 第九章浮力 1、浮力的定义、浮力方向 3、浮力产生的原因：液体对物体向上的压力大于向下的压力即浮力。浸在液体中的物体，总要受到液体对它各个面的压力，液体对物体向上和向下的压力之差，就是液体对浸入的物体的浮力。即 F浮?F向上?F向下。压力差越大
11、，物体所受浮力越大。当物体处于漂浮状态时，浮力等于液体对物体向上的压力，即F浮?F向上。、物体的浮沉条件： 前提条件：物体浸没在液体中，且只受浮力和重力。 请根据示意图完成下空。 液物液物 液物 液物 、说明： 密度均匀的物体悬浮在某液体中，若把物体切成大小不等的两块，则大块、小块都悬浮。 一物体漂浮在密度为的液体中，若露出体积为物体总体积的1/3，则物体密度为 分析：F浮 G则：液V排g =物Vg= 物=液=液 悬浮与漂浮的比较 相同： F浮 G = 不同：悬浮液 =物 ；V排=V物 漂浮液 物；V排 判断物体浮沉有两种方法：比较F浮比较液与物与G或 物体吊在测力计上，在空中重力为G,浸在密
12、度为的液体中，示数为F则物体密度为：物= G/ 冰或冰中含有木块、蜡块、等密度小于水的物体，冰化为水后液面不变，冰中含有铁块、石块等密大于水的物体，冰化为水后液面下降。、阿基米德原理： 1.实验：浮力大小与物体排开液体所受的重力的关系 用弹簧测力计测出物体所受的重力G1,小桶所受的重力G2;把物体浸入液体,读出这时测力计的示数为F1，并且收集物体所排 开的液体;测出小桶和物体排开的液体所受的总重力G3，计算出物体排开液体所受的重力G排=G3-G2。 、公式表示：F浮 G排 =液V排g 从公式中可以看出：液体对物体的浮力与液体的密度和物体排开液 = 体的体积有关，而与物体的质量、体积、重力、形状 、浸没的深度等均无关。 6漂浮问题“五规律”： 规律一：物体漂浮在液体中，所受的浮力等于它受的重力； 规律二：同一物体在不同液体里漂浮，所受浮力相同； 规律三：同一物体在不同液体里漂浮，在密度大的液体里浸入的体积小； 规律四：漂浮物体浸入液体的体积是它总体积的几分之几，物体密度就是液体密度的几分
