问题 解答题

如图是植物细胞结构模式图,据图回答下列问题:

(1)起保护和支持作用的结构是[______]______.

(2)切西瓜时,流出的红水主要来自于图中结构的[______]______.

(3)在光学显微镜下不容易看清楚的结构是[______]______,它能够______.

(4)结构[1]是______,它控制着生物的______和______.

(5)从图中可知,植物细胞有,而动物细胞没有的结构是标号[______]、[______]和[______].

答案

(1)、细胞壁是植物细胞最外层透明的薄壁,具有保护和支持细胞的作用.

(2)液泡内的细胞液中溶解着多种物质(如糖分等);

(3)、细胞膜,紧贴细胞壁内侧,非常薄,在光学显微镜下不容易看清楚,起保护作用并控制物质进出的作用.

(4)细胞核是细胞的控制中心,是遗传物质的主要存在部位,它控制着生物的遗传和变异.

(5)、植物细胞有细胞壁、细胞膜、细胞质、液泡、细胞核、叶绿体等,而动物细胞有细胞膜,细胞质,细胞核,所以动植物体的细胞结构为:细胞质、细胞膜和细胞核,植物细胞比动物细胞多的是4细胞壁、5液泡和6叶绿体.

故答案为:(1)4细胞壁;(2)5液泡;(3)3细胞膜;控制物质进出;(4)细胞核;遗传;变异;(5)4;5;6.

阅读理解

For hundreds of years, Japan has been hit, from time to time, by enormous (巨大的) tsunamis(海啸). These awful sudden risings of the sea are caused by earthquakes or underwater volcanic actions. The story of the boy Yuuki is the story of such a disaster.

Yuuki lived with his family in a seaside village, below a small mountain. One day, as he played on top of the mountain, Yuuki felt a small earthquake but it was not strong enough to frighten anybody and passed quickly. Soon after, however, Yuuki noticed the sea darken and begin running away from the shore very fast, leaving behind wide stretches of beach that had never been seen before.

With a grasp, Yuuki remembered reading that just before a terrible tsunami, the sea suddenly and quickly rolls backward. He ran to the beach, warning the villagers who had gathered to admire the new beach land.

“Get back!” shouted the boy, “There is a terrible danger!”

But no one listened. They laughed at him and continued playing in the new sand and watched the sea roll backward even more.

Desperate, Yuuki could think of only one thing to do. He lit a tree branch, raced to the rice fields and began burning the harvested rice. Then he called out, “Fire! Fire! Everyone run to the mountain! Now!”

When everyone reached the mountain-top, a villager cried out, “Yuuki is mad! I saw him set the fire.” Yuuki hung his head in shame, but said nothing as the villagers cursed him. Just then, someone shouted, “Look!”

In the distance what seemed to be a huge dark line was speeding towards the shore. As it got nearer the people realized the long thin line of darkness was the returning sea, towering like a mountain.

The villagers watched in terror as the water struck the shore, smashing over their homes then tearing out the land as it receded.

On the mountain everyone stared speechlessly at the destruction below.

“I'm sorry I burned the fields,” said Yuuki, his voice trembling.

“Yuuki,” village-chief answered. “You saved us all.”

The villagers cheered and raised Yuuki into the air. “We were going to

celebrate our rice harvest tonight,” said one, “but now we’ll celebrate that we’re all still alive!”

小题1:Where was Yuuki when the earthquake struck?

A.On the beach.

B.On the mountain.

C.In the rice fields.

D.At his family home.小题2: In what order did the following events take place?

a. Yuuki set fire to the rice fields.

b. The villagers laughed and played on the beach.

c. The land was torn away by the water.

d. Yuuki ran to warn the villagers.

e. The villagers stared at the destruction.

f. The people were cursing Yuuki.

A.d, b, e, a, c, f

B.b, a, d, e, c, f

C.d, b, a, f, c, e

D.a, d, b, e, f, c小题3:How did Yuuki save the villagers from the disaster?

A.He told them about the earthquake.

B.He explained why the sea was flowing out.

C.He told the village chief to warn the people.

D.He set fire to the rice field.小题4:What were the people planning to do before the tsunami struck their village?

A.Harvest the rice crop.

B.Play on the beach.

C.Climb the mountain.

D.Celebrate the rice harvest.

单项选择题