题目内容
Will there be robots in the future? What was she doing at 8 o’clock last night? When did you start swimming? What did your math teacher say? I’m going to bring food to the party. | A. When I was eight years old. B. Yes, there will. C. He said I was hard-working. D. If you do, the teacher will take it away. E. She was watching TV. |
【小题1】B
【小题2】E
【小题3】A
【小题4】C
【小题5】D
解析【小题1】本句的含义为在未来将会有机器人吗?本句为一般疑问句,用yes或no来回答,故本题选B。
【小题2】本题的含义为昨天晚上8点钟她正在做什么?问句为过去进行时,回答语中她正在看电视与问句意思相符,故本题选E。
【小题3】本句的含义为你何时开始游泳的?问句问的是时间,回答语中在我8岁的时候表示时间,故本题选A。
【小题4】本句的含义为你的数学老师说了什么?回答语中他说我是勤奋的与问句意思相符,故本题选C。
【小题5】本句的含义为我打算带食物来参加聚会,回答语中如果你做得话,老师将把它们拿走的意思相符,故本题选D。
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Three kids have been learning chemistry for only a few months. But they have already begun to challenge (挑战) a world famous scientist!
Li Weichi, Huang Runling, and Xiao Yan are from Zhongshan Huaqiao Middle School in Guangdong. They have just found a red cabbage that could be a new kind of acid-base indicator (酸碱指示剂). They want it to take the place of litmus (石蕊) paper.
"We've learnt to think of and ask questions about life by ourselves," said Li, "We work well with each other."
British scientist Robert Boyle discovered the use of litmus paper over 300 years ago. Now it is used widely in experiments all over the world.
But when the kids did some experiments in class last winter, they saw that the litmus paper didn’t turn very blue with base matter. It's hard to get a clear result.
Will there be a better indicator than litmus paper? The three kids decided to try and find out!
How? They went to collect over 40 plants in parks, gardens and markets. Then they ground (研磨) leaves, flowers and stems (茎) to get the pigments (色素) from them.
The kids mixed pigments with acid and base. They spent months watching carefully to see which paper showed the best colour change. They decided it was the litmus paper!
"It's our first scientific journey, Huang said, "But it makes me want to try harder."
【小题1】 Whom did the three kids want to challenge?
【小题2】 From the text, a red cabbage is a kind of ____.
【小题3】What is widely used as the acid-base indicator now?
【小题4】The story mainly tells us ____.
Li Weichi, Huang Runling, and Xiao Yan are from Zhongshan Huaqiao Middle School in Guangdong. They have just found a red cabbage that could be a new kind of acid-base indicator (酸碱指示剂). They want it to take the place of litmus (石蕊) paper.
"We've learnt to think of and ask questions about life by ourselves," said Li, "We work well with each other."
British scientist Robert Boyle discovered the use of litmus paper over 300 years ago. Now it is used widely in experiments all over the world.
But when the kids did some experiments in class last winter, they saw that the litmus paper didn’t turn very blue with base matter. It's hard to get a clear result.
Will there be a better indicator than litmus paper? The three kids decided to try and find out!
How? They went to collect over 40 plants in parks, gardens and markets. Then they ground (研磨) leaves, flowers and stems (茎) to get the pigments (色素) from them.
The kids mixed pigments with acid and base. They spent months watching carefully to see which paper showed the best colour change. They decided it was the litmus paper!
"It's our first scientific journey, Huang said, "But it makes me want to try harder."
【小题1】 Whom did the three kids want to challenge?
A.Their chemistry teacher. | B.Their headmaster. |
C.Robert Boyle | D.Thomas Edison |
A.plant | B.animal | C.paper | D.liquid |
A.red cabbage | B.litmus paper |
C.any plant | D.any flower |
A.how to make litmus paper | B.about the three kids' spirit |
C.scientists were wrong | D.the kids are heroes |
–Will there be a basketball game on CCTV-5 tonight?
-__________________. Would you like to watch it with me?
A.Yes, there is. | B.Yes, there will. | C.No, there isn’t. | D.No, there won’t. |