问题 选择题

“姹紫嫣红总是春”,各种鲜艳的花朵装扮着春天,使花呈现出鲜艳色彩的物质叫花青素,这种物质存在于细胞的何种结构中(  )

A.细胞核

B.线粒体

C.细胞膜

D.液泡

答案

细胞核里含有与遗传有关的物质染色体等;线粒体能将细胞中的有机物在氧的参与下分解为二氧化碳和水,同时将有机物中的化学能释放出来,供细胞利用;细胞膜具有保护作用,还能控制物质的进出,把细胞内部与细胞外部的环境分隔开了,使细胞的内部环境保持相对的稳定性,维持其正常的生命活动.控制物质进出时,细胞膜具有一定的选择性,能让对细胞生命活动有用的物质进入,把其他物质挡在细胞外面,同时,还能把细胞内产生的废物排到细胞外.植物细胞的细胞质里有液泡和叶绿体,液泡内的细胞液中溶解着多种物质,如营养物质、有味道的物质、色素等,叶绿体是光合作用的场所.

故选:D

阅读理解

Once Effendi had a joke with the Prime Minister (宰相). He said that the Minister would die the next day. The next day, the Minister fell to the ground from the horse and really died. When the king learned this, he got angry and sent his men to catch Effendi at once.

When Effendi was brought to him, the king shouted angrily, “Effendi, since (既然)you knew when my Minister would die, you must know the date of your own death. Say it out, or you’ll die today.”

Effendi looked at the king for a while. Then he answered, “But how can I know? I’ll die two days earlier than you.” The king was afraid that if he killed Effendi, he himself would die after that. He thought he must keep Effendi alive (活着) as long as possible, so he let Effendi go.

小题1:This story tells us ________.

A.how Effendi fooled (愚弄) the king

B.when the king would die

C.why the Minister died

D.Effendi knew the dates of everyone’s death小题2:The Prime Minister died because ________.

A.Effendi killed him

B.Effendi said he would die

C.He was badly ill

D.He fell off the horse小题3: Why did the king ask Effendi to tell him the date of Effendi’s own death?

A.Because the king wanted to know when he himself would die.

B.Because the wanted to find an excuse to kill Effendi.

C.Because he himself had known the date of Effendi’s death.

D.Because he wanted to know when Effendi would die.小题4:The king let Effendi go because ________.

A.he hoped to live a long life

B.he was afraid of Effendi

C.he didn’t believe (相信) Effendi’s word

D.He knew he would die two days later小题5:Which of the following is not true?

A.Effendi played a joke on the Minister

B.Effendi didn’t know when the king would die.

C.The king was afraid of death.

D.If the king killed Effendi, he himself would die two days later.

单项选择题