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____________________________________           。

＃117: Some people like to have friends who are different from them. Others like to have friends who are similar to them. What kind of friends do you want for yourself?
Kate Join Date: March, 2011 Location: the United Kingdom	I like to have friends who are like me. Both my best friend Vades and I like traveling. We went to Italy last month and stayed there for a week. Next month we want to go to Paris. However, Vades is more athletic than me.
Ditlady Join Date: April, 2011 Location: Canada	I like to have friends who are like me. It can be very helpful. I’m a little quiet and my good friend Libby is quiet, too. Sometimes I don’t know what to do with my problems and she can tell me what I should do, because she knows about me better than people who are different from me.
Harbinger Join Date: May, 2011	Hi, everyone! I went to see the dentist last week and just got here. In my opinion, it is important to have both kinds of friends. That makes your life more interesting.

(　 )51. Where is Kate going next month?

　 A. To the USA.　　　　 B. To the UK.　　　 C. To Italy.　　　　　 D. To France.

(　 )52. What’s Libby like?

　 A. She’s as beautiful as Ditlady.　　　　 B. She’s more outgoing than Ditlady.

　 C. She’s as quiet as Ditlady.　　　　　　 D. She’s more athletic than Ditlady.

(　 )53. What was the matter with Harbinger last week?

　 A. He had a cold.　　　　　　　　　　　 B. He had a headache.

　 C. He had a fever.　　　　　　　　　　　 D. He had a toothache.

(　 )54. What kind of friends does Harbinger like to have?

A. Those who are different from him.　　　 B. Those who are the same as him.

C. He doesn’t like to make friends. D. He likes to have both kinds of friends.

(　 )55. What does the underlined word “similar” mean?

A. 一致的　　　　 B. 相似的　　　　 C. 友好的　　　　　 D. 简单的

＃117: Some people like to have friends who are different from them. Others like to have friends who are similar to them. What kind of friends do you want for yourself?

Kate

Join Date: March, 2010

Location: the United Kingdom

I like to have friends who are like me. Both my best friend Vades and I like traveling. We went to Italy last month and stayed there for a week. Next month we want to go to Paris. However, Vades is more athletic than me.

Ditlady

Join Date: April, 2010

Location: Canada

I like to have friends who are like me. It can be very helpful. I’m a little quiet and my good friend Libby is quiet, too. Sometimes I don’t know what to do with my problems and she can tell me what I should do, because she knows about me better than people who are different from me.

Harbinger

Join Date: May, 2010

Hi, everyone! I had a cold last week and just got here. In my opinion, it is important to have both kinds of friends. That makes your life more interesting.

41. Where is Kate going next month?

　 A. To the USA.　　　　 B. To the UK.　　 　 C. To Italy.　　　　　 D. To France.

42. What’s Libby like?

A. She’s as beautiful as Ditlady.　　　　 B. She’s more outgoing than Ditlady.

C. She’s as quiet as Ditlady.　　　　　　 D. She’s more athletic than Ditlady.

43. What was the matter with Harbinger last week?

A. He had a cold.　　　　　　　　　　　 B. He had a headache.

C. He had a fever.　　　　　　　　　　　 D. He had a toothache.

44. What kind of friends does Harbinger like to have?

A. Those who are different from him.　　 　B. Those who are the same as him.

C. He doesn’t like to make friends.　　　　 D. He likes to have different kinds of friends.

45. What does the underlined word “similar” mean?

A. 一致的　　　　 B. 相似的　　　　 C. 友好的　　　　　 D. 简单的