生物生长发育的温度三基点是指最低温度、最高温度和______。

两位数的质数中，两个数字和最大的值为______．

Chinese people call the Spring Festival“Nian”. But do you know that Nian

was once the name of a monster(妖怪)?

　　A long time ago, the monster Nian lived in the mountains. It ate

animals. But in winter, it could not find food. So it came to villages and

ate a lot of people. People were so afraid of Nian that they locked their

doors before evening came during the winter. One day, an old man came to a

village. He told people there that Nian was afraid of three things——the

color red, fire and noise. He told people to play drums and gongs, make

big fires and set off fireworks(放鞭炮)to make Nian go away.

　　On a moonless, cold night, Nian went to the village again. As soon as it

opened its big mouth, people made loud noises and made fires. Nian was

really afraid and ran away. wherever it went, there was noise and fire.

When Nian was tired and could not run anymore, people killed the monster.

　　After that, on the coldest day of winter, people beat drums and gongs,

and set off fireworks to celebrate the death of the monster of Nian. They

put up red lanterns and have a big dinner without sleeping during the

night.

　　In the morning people greet each other happily. So now we have the

Spring Festival.

小题1: From the story, Nian seemed to be       long, long ago.

A exciting    B  interesting    C boring   D terrible

小题2: The monster Nian ate people in winter because it          .

A  wanted to make people afraid    B  had no food to eat

C  celebrated the Spring Festival    D liked to eat people in a village

小题3:Nian was afraid of          .

A red    B fire   C noise    D  A, B and C

小题4: The monster Nian wasn’t killed until          .

A it had eaten all the animals  B  the old man came to a village

C it was too tired to run away  D people knew what it was afraid of

小题5: What is the best title for the passage?

A How the Spring Festival Came  B What People did During Nian

C How People Celebrated Nian  D What the Spring Festival was 

根据合同法律制度的规定，下列合同中，根据合同性质债权人可以将合同的权利全都或者部分转让给第三人的是( )。

A．借款合同

B．赠与合同

C．委托合同

D．雇用合同

等质量的甲、乙、丙、丁、戊、己6种只含C、H、O三种元素的有机物，分别充分燃烧时，消耗等量的O₂，且生成的气体全部分别通过足量的浓硫酸、碱石灰后，浓硫酸与碱石灰质量增重之比均为9：22．已知：

①6 M（甲）=3 M（乙）=3 M（丙）=3M（丁）=2M（戊）=M（己）=180；

②乙、戊的水溶液可使甲基橙试液变红，相互之间在一定条件下能发生酯化反应；

③戊的核磁共振氢谱显示有4种不同特征的氢原子，数量之比为3：1：1：1；

④甲、丙、丁、己均能发生银镜反应．丙不易溶于水但丁易溶于水．

请回答下列问题：

（1）甲的结构简式为______；己有多种同分异构体，其中一种存在于糖尿病患者的尿液中，写出其结构简式______．

（2）乙、丙、丁三者之间的关系是______；丁的结构简式为______．

（3）写出2分子戊生成1分子环状酯的化学方程式______．

分清蝴蝶和蛾子，下面哪个是错误的？（）

A、蝴蝶的触角多是棒状，蛾类的触角多呈羽状

B、蝴蝶多在白天活动，蛾类多在晚上活动

C、蝴蝶休息时翅膀大多合拢竖立在背上，蛾类则大多将翅膀平铺

D、蛾子的蛹通常没有茧，蝴蝶的蛹有茧