问题 选择题

在草履虫培养液的边缘放一粒小食盐,草履虫会避开食盐粒,这说明草履虫具有以下什么生命特征:

A.需要营养

B.对外界刺激作出反应

C.生长、繁殖

D.排出废物

答案

答案:B

题目分析:生物具有以下特征:1、生物的生活需要营养,2、生物能够进行呼吸,3、生物能排出体内产生的废物,4、生物能够对外界刺激作出反应,5、生物能够生长和繁殖,6、除病毒外,生物都是由细胞构成的,食盐粒对于草履虫来说是不利的刺激,草履虫逃避有害刺激,说明了草履虫具有应激性,能够对外界的刺激作出反应,故选B。

阅读理解

A farmer had a cow.

A farmer had a cow. He took very good care of this cow and one day when it was ill, he was very worried. He telephoned the vet.

“What’s the problem?” The vet asked him when he arrived.

“My cow’s ill,” the farmer said. “I don’t know what's the matter with her. She’s lying down and won’t eat. She’s making a strange noise.”

The vet looked over the cow. "She’s certainly ill," he said, "and she needs to take some very strong medicine."

He took a bottle out of his box, put two pills into his hand and said, "Give her these. The pills should make her better."

“How should I give them to her?” the farmer asked.

The vet gave him a tube (管子)and said, "Put this tube in her mouth, then put the pills in the tube and blow(吹). That’ll make it."

The next day the vet came to the farm again. The farmer was sitting outside his house and looked more worried.

“How’s your cow?” the vet asked.

“No change,” the farmer said, “and I’m feeling very strange myself.”

“Oh?” the vet said, "Why?"

“I did what you said,” the farmer answered. “I put the tube in the cow’s mouth and then put two pills down it.”

“And?” the vet asked.

“The cow blew first,” the farmer said.

小题1:The farmer asked the vet for help when his cow _______

A.couldn't lie down

B.didn't eat the pills

C.couldn't make any noise

D.was ill小题2:What medicine did the vet give the farmer?

A.A bottle of pills.

B.A long tube.

C.Two pills.

D.A small box.小题3:The vet taught the farmer how _________.

A.to blow the tube

B.to make the cow take the pills

C.to take the medicine

D.to put the tube in his mouth小题4:Which of the following is true?

A.The farmer ate the pills himself.

B.The cow got better after taking the medicine.

C.The vet came to help the farmer change the cow the next day.

D.The farmer was working outside his house the next day.

单项选择题