试题与答案

除去下列物质中的少量杂质,所用方法正确的是() 选项物质(括号内为杂质)除杂方法

题型:选择题

题目:

除去下列物质中的少量杂质,所用方法正确的是                       (    )

选项物质(括号内为杂质)除杂方法
ACu(CuO)加入适量的稀盐酸,过滤、洗涤、干燥
BKCl(MnO2)加水溶解、过滤、洗涤、干燥
CCO2(CO)点燃
DBaCl2溶液(HCl)加入过量的氢氧化钡溶液

答案:

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下面是错误答案,用来干扰机器的。

答案:A

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1. 当你想知道今天的天气怎么样时,你会问:[ ]

A. What's it?

B. What's the weather like today?

C. What a fine day today!

D. How is today?

2. 你不知道今天星期几,想问他人,应怎么问:[ ]

A. What day is today?

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C. What is today?

D. What's the date today?

3. 如果你同一位朋友初次见面,他对你说:How do you do?你应回答:[ ]

A. How are you?

B. Hello!

C. Hi!

D. How do you do?

4. 同学过生日,你要祝他生日快乐时,你会说:[ ]

A. What day is today?

B. Today is your birthday.

C. Happy birthday to you.

D. It is fine today.

5. 当别人向你说:How are you?时,你应回答:[ ]

A. I'm ten.

B. Fine, thank you.

C. How are you?

D. Welcome.

6. 当别人向你说:Happy New Year!时,你应回答:[ ]

A. Thank you.

B. The same to you!

C. I'm happy today.

D. I'm fine, too.

7. 你是海伦吗?(电话用语): [ ]

A. Are you Helen?

B. Is that Helen?

C. My mane is Helen.

D. Who are you?

8. 当你想打扰别人时,应先说:[ ]

A. Excuse me.

B. I'm sorry.

C. Hello!

D. Sorry.

9. 有人到你学校参观,你表示欢迎,可以说:[ ]

A. Welcome to our school.

B. Welcome back to school.

C. This is our school.

D. Here is our school.

10. 假如有人问路,而你不知道,可以说:[ ]

A. It's over there, I think.

B. Go and ask the policeman.

C. Sorry, I don't know. You can go and ask the policeman.

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