下列气体性质的表述错误的是 A.CO2能还原铁矿石 B.O2能支持燃烧

题型:选择题

问题:

下列气体性质的表述错误的是                        

A.CO2能还原铁矿石

B.O2能支持燃烧

C.N2是无色无味的气体

D.H2是最轻的气体

考点:物理变化和化学变化的特征和判别物理性质和化学性质的区别和应用氨气的性质二氧化硫的性质
题型:选择题

阅读理解。

     This is a room in Kate's house. There is a big bed, a table, a computer and some chairs in it. There's a

glass and some books on the table. There is a picture on the wall. Kate is in the room. She is looking at the

picture. Her father and mother are in the school. They work hard.

1. Is there only one room in Kate's house?   

A. Yes, there is.

B. There is a bed.

C. There is a computer.

D. I don't know.

2. What's in the room?   

A. Only a bed.

B. Only a table.   

C. Only some chairs.

D. A bed, a table, a computer and some chairs.

3. Is there anything on the table?

A. Yes, there is.

B. No, there isn't.  

C. Some books.

D. A glass.

4. Who is at home?   

A. Kate's father.

B. Kate's mother.  

C. Kate's brother.

D. Kate.

5. Kate's father and mother are _____.   

A. teachers

B. students

C. friends

D. at home

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如果打麸机刷过的麸皮含粉较高,应从哪几方面找原因?应采取哪些措施?

题型:选择题
工程队挖一条水渠,每天挖1.4千米,10天挖了全长的
7
10
,还剩多少千米没有挖?
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产业结构的不协调表现在哪些方面?

题型:选择题

关于对联的产生,下列说法不正确的是()

A.对偶修辞手法孕育了对联,但是,对偶并不等于对联

B.对联的产生,源于我国古代的一种习俗——挂“桃符”

C.对联开始是写在桃木板上的,后来才写在纸上

D.保留至今的最早的对联是唐代的

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