问题 实验题

下图甲为叶片的结构示意图,请据图回答:

(1)图中①是_________,②是_________,③是_________,④是__________。

(2)乙图表示____________的结构,该结构中含有能够吸收光能的色素,其中最主要的是____________,它使植物呈现绿色。

答案

(1)上表皮  下表皮   叶脉  叶肉细胞

(2)叶绿体   叶绿素

题目分析:叶片由表皮、叶肉和叶脉组成,表皮包括上表皮和下表皮,表皮由一层排列紧密、无色透明的细胞构成,表皮细胞的外壁上有一层透明的、不易透水的角质层,表皮主要起保护作用,属于保护组织,③叶脉里有导管和筛管,导管能够向上运送水和无机盐,筛管能够运送有机物,因此叶脉具有输导作用,④叶肉细胞中含有很多的叶绿体,是进行光合作用的主要部位,其中含叶绿素最多。

阅读理解

阅读理解。

     A 36-year-old man stormed into the Ramona Post Gffice, yelling at everyone to get out of his way.

Carrying a shotgun, he climbed up onto the counter and told everyone to lie on the floor. Then he pulled

the trigger (扳机) and fired a round into the ceiling. Piaster splattered (飞溅) onto the floor and the

customers.

     The man ordered all the customers and employees to sit tip and look at him. He said,"Repeat after me:

I hate the post office!" Everyone repeated the words. He fired a second round, but this time he aimed at

the front plate glass window. Shattered (粉碎的) glass went everywhere.

     Three minutes later, five police cars pulled up in front of the post office, lights flashing and sirens (警

报器) roaring. Using a bullhorn (喇叭), a police officer told the man to' walk out backwards with his

hands up. The man fired another blast out of the shattered window. The police officer and his bullhorn

were uninjured. However. one police car had t~ee little pit marks in it.

     The man yelled,"I' m not coming out until the post office pays me for pain and suffering. A postal truck

ran into my car two years ago. My back is killing me. I can' t work any more. My wife left me. I can' t

take it any more.""

     After a while, the man calmed down. He released all the people inside. At 7:00 p. m.", the man walked

out backwards with his hands up. The police handcuffed (给… …带上手铐) him, put him in the back

seat of the car, and drove him to the police station.

1. What was the exact situation in the post office?

A. A man rushed in and shot at the customers.

B. An angry man with a gun was robbing the customers of money.

C. A man rushed in and shot at the ceiling and the window on a workday.

D. A man aged 36 shot at the window first and then the police car.

2. What can be inferred from the passage? 

A. The customers were threatened by the man and did what he asked.

B. Although the man was so careful, the police heard the news.

C. The police officer was injured during his persuasion.

D. After a fierce battle, the police caught him.

3. Why did the man storm into the post office?

A. He wanted to kill the workers in the post office.

B. He wanted to rob the post office of money.

C. He wanted the post office to pay for what he had suffered.

D. He had something wrong with his head.

4. How did the man probably feel during the event?

A. Angry→excited→helpless

B. Excited→angry→calm

C. Angry→frightened→regretful

D. Bold→puzzled→calm

问答题 简答题