Dear John,

　　Thank you very much for your letter. I am glad that you enjoyed your holiday with me. We enjoyed having you and your sister here. We hope that you can come again next year. Perhaps you are staying longer next time you come. A week is not really long enough, is it? If your school has five weeks' holiday next year, perhaps you can stay with us for two or three weeks.

　　We have been long back at school three weeks now. It feels like three months! I think that you are both working very hard now because you are in Grade One. I shall have to work hard next year when I am in Grade One. Tom and Ann won't be in Grade One until 2006.

　　They went for a picnic yesterday but I didn't go with them because I cut (切、割) my foot and I couldn't walk very well. They went to an island (岛) and enjoyed themselves there. Do you still remember (记得) the island? That's where all five of us spent the last day of our holiday.

　　Tom, Ann and I send our best wishes to Betty and you. We hope to see you soon.

Yours sincerely,

Michael

(1) ________ stayed with Michael for a holiday.

[　　]

(2) Their holiday lasted for ________.

[　　]

(3) From the words of “It feels like three months!” we know that ________.

[　　]

A．Michael's teacher is very friendly to the students

B．Michael is pleased with (对……感到满意) his school report

C．Michael has no interest in learning

D．Michael works very hard at his studies

(4) ________ in Grade One now.

[　　]

A．John and his sister are both

B．John is

C．John's sister is

D．Michael is

(5) Why didn't Michael go to the island for a picnic?

[　　]

A．He had to go to school.

B．He did not like the island.

C．Something was wrong with his foot.

D．The weather was bad that day.

Have you ever been ill? When you are ill，you must be unhappy because your body becomes hot，and there are pains all over your body. You don't want to work，you stay in bed，feeling very sad.

　　What makes us ill? It is germs(细菌). Germs are everywhere. They are very small and you can't find them with your eyes，but you can see them with a microscope. They are very small and there could be hundreds of them on a very small thing.

　　Germs are always found in dirty water. When we look at dirty water under the microscope，we shall see them in it. So your father and mother will not let you drink dirty water. 

　　Germs aren't found only in water. They are found in air and dust. If you cut your finger，if some of the dust from the floor goes into the cut(割开处)，some of the germs would go into your finger. Your finger would become big and red，and you will have much pain in it. Sometimes the germs would go into all of your body，and you would have pain everywhere.

1.Which of the following is TRUE?

A. If things are very small，they are germs. 

B. If things can't be seen，they must be germs.

C. Germs are only in dirty water.     

D. Germs are everywhere around us. 

2.What is a microscope used for?

A. Making very small things look much bigger.

B. Making very big things look much smaller.

C. Helping you read some newspapers.

D. Helping you if you can't see things clearly. 

3.Why don't your parents let you drink dirty water?

A. You haven't looked at it carefully.　   B. Water can't be drunk in this way.

C. There must be lots of germs in it.　   　　D. Water will make you ill. 

4.Which of the following is NOT true?

A. Germs can be found both in water and in the air.

B. Germs can go into your finger if it is cut.

C. If your temperature is not OK，there must be germs in your body.

D. If your finger isn't cut，there aren't any germs on it. 

5.What's the main idea of the passage?

A. Germs may make us ill.　　　　    B. Germs are in dirty water.

C. Don't drink dirty water.　　　　     D. Take care of your fingers.

 

明同学利用A、B两物体、砝码、泡沫等器材探究“压力的作用效果与什么因素有关”的实验．如图

（1）实验中，小明是通过观察　　　▲　　　来比较压力作用效果的．
（2）比较甲、乙两图所示实验，能够得到的结论是：       ▲  　　　
（3）若要探究“压力的作用效果与受力面积大小的关系”，应通过比较图　  ▲  
所示实验．
（4）小华同学实验时将物体B沿竖直方向切成大小不同的两块，如图丁所示．他发现
它们对泡沫的压力作用效果相同，由此他得出的结论是：压力作用效果与受力面积无关．你认为他在探究过程中存在的问题是：          ▲            ．

萘乙酸（NAA）是科学家通过化学的方法合成和筛选的在结构和生理作用方面与生长素相似的物质，其生理作用也与浓度密切相关，探究萘乙酸（NAA）对扦插枝条生根作用的最佳浓度范围，在农业生产的应用上具有非常重要的意义。
　一、实验原理：
萘乙酸与生长素一样，对植物生长的调节作用具有___________________________性，即
_______________________________________________________________。（2分）
二、实验过程与方法：
（1）取材；取山茶花植株生长良好的半木质枝条，剪成5—7cm，每段插条芽数相同。
（2）实验：①将插条分别用不同的方法处理如图1；②将处理过的插条下端浸在清水中，注意保持温度（25～30℃）。
（3）记录：小组分工，根据实验数据，建立数学模型如图2。
三、结果分析与评价：
（1）从图2中，可得出的结论是_________________________________________          。
（2）插条若没有生出不定根，其原因最可能是____________________________            。
（3）温度、处理时间等要一致，其原因是_________________________________           。
（4）每组都选取10根插条，其目的是____________________________________           。