下列图像能正确反映对应变化关系的是
A . ①向等质量的锌粉和铁粉中分别加入足量等浓度的稀盐酸
B . ②加热氯酸钾和二氧化锰的混合物制取氧气
C . ③在密闭容器中用足量红磷测定空气中氧气的含量
D . ④向一定质量的饱和氢氧化钙溶液中加入氧化钙
读中国局部区域简图(下图),回答下列问题。

(1)图中的三条铁路线中,到达香港特别行政区的是 线(填数字代码),名称是 。
(2)字母A所示山脉的名称是 ,它和淮河构成了我国重要的地理分界线。
(3)下列由青岛港运往海口的农产品,不可能的是 ( )
A.小麦 B.苹果 C.油菜 D.棉花
(4)图示区域内水资源分布不均,甲乙两地区中, 地区水资源不足,该地的居民在日常生活中应注意节约用水。
瓦子在宋代城市盛行,主要的原因( )
A士大夫的提倡 B市民阶层不断壮大 C城市的繁荣 D商业的发展
请对下图四种动物按照从低等到高等的顺序排列,其中排序正确的一组是( )

A.甲、乙、丙、丁 B.甲、丁、乙、丙
C.丁、甲、乙、丙 D.甲、丙、丁、乙
人体运动系统的组成不包括( )
A.骨 B.关节 C.神经 D.肌肉
键线式可以简明扼要的表示碳氢化合物,
这种键线式物质是( )
A.丁烷 B.异丁烷 C.异戊烷 D.新戊烷

粤菜、川菜、湘菜是我国著名的菜系,其发源地分别是( )
A.福建、四川、湖南
B.广东、四川、湖南
C.湖北、云南、河南
D.河北、四川、河南
如图所示,L1、L2为两平行的直线,间距为d.L1下方和L2上方的空间有垂直于纸面向里的匀强磁场,且磁感应强度均为B.现有一质量为m、电荷量为+q的粒子,以速度v从L1上的M点入射两线之间的真空区域,速度方向与L1成θ=30°角.不计粒子所受的重力,试求:
(1)粒子从M点出发后,经过多长时间第一次回到直线L1上?
(2)若在直线L1、L2之间的平面内,存在与图示速度方向垂直斜向上场强为E的匀强电场,则粒子经过多长时间第一次到达直线L2?
(3)若直线L1、L2之间无电场,v满足什么条件时,粒子恰好能回到M点?

如图5-1-29所示,将一根导体棒ab的两端用细导线与灵敏电流计组成一个闭合电路,并用绝缘细线悬挂起来放在U形磁铁的磁场中.
(1)让导体棒ab水平向左运动时,灵敏电流计的指针向右偏转;导体棒ab水平向右运动时,指针向左偏转,说
明感应电流的方向与________________有关.
(2)让导体棒ab水平向右缓慢运动时,灵敏电流计的指针向左偏转的角度较小;导体棒ab水平向右快速运动时,灵敏电流计的指针向左偏转的角度较大,说明感应电流的大小与________________有关.
(3)让导体棒沿竖直方向上下运动时,电路中______
感应电流产生.
(4)下列电器中,应用电磁感应原理制成的是( )
A.电铃 B.电风扇 C.动圈式话筒 D.动圈式扬声器
图5-1-29
如图所示,匀强磁场中有一个用软导线制成的单匝闭合线圈,线圈平面与磁场垂直.已知线圈的面积S=0.3m2、电阻R=0.6Ω,磁场的磁感应强度B=0.2T.现同时向两侧拉动线圈,线圈的两边在Δt=0.5s时间内合到一起.求线圈在上述过程中
(1)感应电动势的平均值E;
(2)感应电流的平均值I,并在图中标出电流方向;
(3)通过导线横截面的电荷量q.


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(Ⅰ)设
证明:
,
(Ⅱ)
,证明
.
Nowadays more and more Chinese teenagers find life more difficult without their parents. They don’t know how to do 56 because their parents do 57 everything for them at home. This is a big problem.
Joy is 14 years old. One day her parents went away 58 business, so she had to stay at home alone. At first she thought she would be happy 59 her parents were not in. She could do everything 60 she liked. But it was six o’clock in the afternoon, she felt 61 . “Oh, it’s time 62 supper. Where can I get my food?” she said to 63 . Later she found some food in the fridge, but she 64 know how to cook. At that moment, she missed h
er 65 very much. At last she could only go to the supermarket and 66 some food to eat.
Many of teenagers are 67 as Joy. So I think they should learn some basic life 68 , like cooking, tidying up their rooms or dressing themselves 69 . They shouldn’t 70 too much on their parents.
( )56. A. homework B. some shopping C. business D. housework
( )57. A. always B. hardly C. almost D. most
( )58. A. in B. at C. on D. with
( )59. A. so B. because C. but D. until
( )60. A. that B. who C. where D. when
( )61. A. hungry B. full C. excited D. bored
( )62. A. has B. to have C. having D. had
( )63. A. himself B
. her C. herself D. him
( )64. A. couldn’t B. didn’t C. might not D. wouldn’t
( )65. A. cousin B. aunt C. brother D. parents
( )66. A. made B. bought C. gave D. saw
( )67. A. the same B. difficult C. different D. easy
( )68.A. skills B. plans C. advice D. lesson
( )69. A. actually B. carelessly C. properly D. slowly
( )70. A. stick B. depend C. provide D. prevent
上初中的小明是班里的胖墩,平时最爱吃肉和巧克力,每天都带饮料上学,班里的矿泉水他从来不喝。请你用学过后知识分析。
(1)从营养角度讲,小明属于 症,也是 的一种表现。
(2)不科学的饮食习惯可能会给人的健康带来危害。如口味过重的人做菜总是咸了才够味,长期摄入过多的盐,容易患 ;长期不吃早饭的人易患 ;过节假日或朋友请客就暴饮暴食,会引起 。
下图是蝗虫的外部形态图。据图回答:

(1)蝗虫的身体分为 、 、 三个部分。
(2) 体表的外骨骼的作用有保护和 。
(3) 蝗虫共有三对足,其中适于跳跃的是发达的[ ] 。
(4)蝗虫的翅共 对,是它的飞行器官。
我国水资源时空分布的特点是( )
①东南多,西北少
②西北多,东南少
③夏秋多,冬春少
④冬春多,夏秋少
A、①④ B、①③ C、②③ D、②④
Bill White’s father is a lawyer. In his 41 time, he likes to get out in the country and take some 42 of animals.
For a long time, Bill had wanted to go with his father on one of his 43 . But his father didn’t take Bill along with him 44 he was fifteen.
He and Bill drove to the farm which 45 to his uncle in the afternoon. They 46 the night there, so that they could 47 out early the next morning. Uncle Steve and his son Larry, who was sixteen, were going to go out with them.
It was still dark when Bill heard the alarm 48 the next morning. He wondered why it was running so early. He couldn’t remember 49 he was. He turned over 50 and looked at the clock. It was 5 o’clock. Then he 51 that he was at the 52 and that he was going out to take pictures with his father. He jumped out of bed and got 53 quickly.
He ran downstairs. The others were already in the 54 . Uncle Steve was cooking bacon and eggs. There was a pot of coffee on the stove. It 55 good.
They ate breakfast quickly. They didn’t talk 56 , because they didn’t want to 57 up the other people in the house. They filled a thermos bottle 58 hot coffee and took some sandwiches 59 Aunt Grace, Uncle Steve’s wife, had made for them. They gathered their camera 60 and started out.
| 41. | A. busy | B. spare | C. enough | D. limited |
| 42. | A. foods | B. drawings | C. paintings | D. pictures |
| 43. | A. trips | B. buses | C. holidays | D. mountains |
| 44. | A. after | B. when | C. until | D. unless |
| 45. | A. led | B. stuck | C. got | D. belonged |
| 46. | A. cost | B. spent | C. slept | D. took |
| 47. | A. start | B. begin | C. walk | D. step |
| 48. | A. telephone | B. machine | C. bell | D. clock |
| 49. | A. where | B. how | C. who | D. what |
| 50. | A. quickly | B. sleepily | C. quietly | D. suddenly |
| 51. | A. imagined | B. pronounced | C. forgot | D. remembered |
| 52. | A. mountain | B. town | C. farm | D. station |
| 53. | A. dressed | B. ordered | C. eaten | D. prepared |
| 54. | A. bathroom | B. kitchen | C. dining-room | D. sitting-room |
| 55. | A. seemed | B. felt | C. tasted | D. smelled |
| 56. | A. many | B. soundly | C. much | D. highly |
| 57. | A. wake | B. go | C. put | D. come |
| 58. | A. of | B. with | C. in | D. by |
| 59. | A. that | B. what | C. after | D. before |
| 60. | A. cover | B. supply | C. operator | D. equipment |


