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中考试题

呼吸时体内进行气体交换的原理是（　　）
A. 扩散作用
B. 渗透作用
C. 消化作用
D. 吸收作用

将红色番茄的花粉传给黄色番茄的雌蕊，受精后花中会发育成番茄果肉的结构以及所结果实的颜色依次是（　　）
A. 子房壁黄色 B. 珠被红色
C. 子房壁红黄相间 D. 子房黄色

常温下，下列有关溶液中微粒的物质的量浓度关系正确的是

A ． 1L 的溶液中：

B ．溶液中：

C ． pH 为 4 的 NaHA 溶液中：

D ．等浓度的碳酸钠和碳酸氢钠溶液混合后的溶液中：

“麻雀虽小，五脏俱全”，生物体内存在不同的结构是由细胞的结果

A.生长 B.分化 C.分裂 D.癌变

小云通过探究发现，氯酸钾与氧化铜 (CuO) 或氧化铁 ( ) 混合加热，也能较快产生氧气，于是进行如下探究 :

（查阅资料）氯酸钾的熔点为 356°C ，常温下稳定，在 400°C 以上则分解产生氧气。酒精灯加热温度为 400°C ～ 500°C 。

（提出猜想）除、外，也可以作氯酸钾分解的催化剂。

（完成实验）按如表进行实验并测定分解温度。 ( 分解温度越低，催化效果越好 ) 。

实验编号	实验药品	分解温度
1	3.0g 氯酸钾	460°C
2	3.0g 氯酸钾和 0.5g 二氧化锰	248°C
3	3.0g 氯酸钾和 0.5g 氧化铜	267°C
4	3.0g 氯酸钾和 xg 氧化铁	290°C

（分析数据，得出结论）

（ 1 ）实验 4 中 x 的值应为 _______ ，由实验 ______ 与实验 4 相比，证明猜想合理 .

（ 2 ）小云从如图中选择该实验的最佳发生装置是 ________ ( 填字母 ) ，该装置的优点是 ______________ 。

（ 3 ）实验 3 的符号表达式为 : __________ ；

（ 4 ）同种催化剂还有哪些因素会影响催化效果，请写出一种因素并设计实验方案进行验证 :

影响因素 : ______________ ；

实验方案 : ______________ ；

五千年的中华文明史，不仅创造了辉煌的文化，而且创造了伟大的民族精神，这种民族精神的核心是

A．团结统一 B．爱好和平 C．爱国主义 D．自强不息

回收含铜废料 ( 主要成分为 Cu) 中的铜，部分实验流程如下：

注：灼烧后得到黑色固体和残留物，残留物不溶于水和稀硫酸。

下列关于该流程的说法，错误的是

A ． “ 灼烧 ” 的主要目的是将 Cu 转变为 CuO B ．滤液 X 中的溶质为 FeSO ₄

C ． “ 酸溶 ” 和 “ 还原 ” 过程中发生的反应均为置换反应 D ．将 Cu 、 Fe 混合物加入足量稀硫酸中，充分反应后过滤得 Cu

火药是我国的四大发明之一，已知黑火药爆炸的化学方程式为：，此反应涉及到的化学用语表示方法正确的是

A ．硝酸钾中的硝酸根离子： B ． 3 个碳原子： 3C

C ．单质硫中硫元素的化合价： D ．硫酸钾的化学式： K ₂ S

植物细胞中的能量转换器是（　　）
A. 细胞核和线粒体 B. 线粒体和叶绿体
C. 细胞核和叶绿体 D. 液泡和叶绿体

There are many ways to help improve your health like eating healthy food. Taking exercise and getting medical help. But the easiest and cheapest way to improve your health is just to sleep eight hours or more every night. The general sleeping rule is that the younger you are, the longer sleep you need. But regardless of(不管)age, some people need to sleep more while for some a few hours is enough.

The problem with sleep is that more and more people in the world are not sleeping enough. According to the World Health Organization over half the people in the world may be sleep-deprived. Having less sleep not only makes people feel tired but also causes accidents. In the United States alone, sleepy drivers cause at least 100,000 traffic accidents a year. Also sleep problems can cause medical problems such as high blood pressure(血压).

Why are so many people sleep-deprived? Part of the reasons may be cultural. In the American culture, people put a higher value on work than on sleep. In fact, peopele who sleep a lot are usuallv seen as ＂lazy＂. Also, you can sometimes hear some people say proudly that they don’t have much time to sleep. they only sleep four or five hours a night. It seems that the less you sleep, the more work you’ll do.

How do we teach these people to learn the value of sleep? Perhaps they may listen to the advice of Dr. James Maas an expert (专家) in sleep. He says , ＂Sleep is like a credit (信用卡) card. When you sleep less. you are only borrowing time. You always have to pay it back. The morehours you don’t sleep, the more hours you should t sleep to ‘pay back’ the hours on your ‘sleepcredit card.’＂

For those who value work more than sleep, they should listen to what a famous person once said. ＂Don’t think you will be doing less work because you sleep during the night. That is a foolish(愚蠢的) idea which is held by people who have no imagination. You will be able to do more.＂

41. According to the writer, the easiest and cheapest way to improve health is to _________.

A. eat healthy food every day B. take excrcise as much as possible

C. get medical help whenever necessary D. sleep eight hours or more every night

42. What does ＂slecep-deprived＂ mean in Paragraph 2?

A. Having a good sleep. B. Excited about sleep.

C. Having less sleep. D. Interested in sleep.

43. According to Dr. James Maas. what is sleep like?

A. An hour. B. A report.

C. A credit card. D. A piece of paper.

44. What do the words of the famous person mean in Paragragh 5?

A. Sleeping during the night is foolish. B. Sleeping during the night is helpful.

C. People have no courage. D. People always do less work.

45. What is the best title of the passage’?

A. The Value of Sleep B. The Value of Study

C. The Ways of Eating Less D. The Ways of Making Money

除去下列物质中的少量杂质（括号内为杂质），其操作不正确的是

A. Cu粉（Fe粉）------用磁铁吸引

B. N₂（O₂）-------将混合气体通过灼热的铜丝网

C. CO（CO₂）------将混合气体通过灼热的氧化铁粉末

D. MnO₂（KCI）------将混合物溶解于水、过滤、洗涤、干燥

Nezumi was a mouse. He was thinking about finding a husband for her daughter Suki. But Suki said, “Father, I wish to marry Taro.”

Taro was smart and strong, but Taro’s parents were not rich or powerful. “My Suki can’t marry a common mouse!” Nezumi said. “I’ll find someone powerful for my daughter.” Nesumi traveled far and wide, but nobody met his high standards.

One day, he climbed to the top of a mountain. “Hi, Sun!” Nezumi called. “Nobody is more powerful than you. I’d like you to marry my daughter.” Sun smiled and said, “Yes, I’m powerful. Without me, nothing grows. But when Cloud covers my face, the world grows cold.” As Cloud came, Sun disappeared.

Nezumi bowed to Cloud and told him his wish. “Surely I’m powerful,” he said. “But here comes someone stronger.” And Wind blew Cloud away.

Then Nezumi shouted his wish to Wind. “Of course I’m powerful. But I can’t pass through Wall,” said Wind.

When Nezumi told Wall his wish, Wall said quietly, “Yes, I’m powerful. I keep enemies away. But I’m afraid of mice like you, who dig under me and make me fall down.”

Nezumi let out a big laugh. He ran back home and said to Suki, “My dear! You are right. Taro will be a powerful husband.”

1 ． Nezumi wanted to find ________ for her daughter.

A ． a ring B ． a house C ． a husband D ． a friend

2 ． Nezumi thought that Taro’s parents were not ________ .

A ． rich B ． smart C ． polite. D ． honest

3 ． Where did Nezumi call to Sun?

A ． In his yard. B ． On a mountain. C ． In his hole. D ． On the beach.

4 ． Wall aid that he was afraid of ________ .

A ． Sun B ． Cloud C ． Wind D ． mice

5 ． From the last paragraph, we can infer （推断） that ________ in the end.

A ． Suki and Taro got married B ． Nezumi laughed at Suki

C ． Suki ran away from home D ． Nezumi fought with Taro

图是心脏结构简图，在心脏的四个腔中，流动脉血的是（）

A. 右心房、右心室 B. 左心房、左心室 C. 左心房、右心房 D. 左心室、右心室

（题文）下列语句中加点的成语使用有误的一项是（）
A. 第54届世乒赛男子团体决赛中，半决赛淘汰了瑞典队的中国队卷土重来，成功卫冕。
B. 在这片劫后重生的土地上，人人各得其所，各展其长，满怀信心创造幸福美满的生活。
C. 充分发挥丝绸之路的纽带作用，可以让历史背景不同的亚欧各国息息相通，共同繁荣。
D. 《经典咏流传》以崭新的形式推介古典诗词，对弘扬传统文化具有不容置疑的作用。

如图是部分蝶形花科植物分类图解，据此图分析正确的（　　）