如下图所示,硅芯片是各种计算机、微电子产品的核心,工业上通过以下反应将自然界的二

题型:选择题

问题:

如下图所示,硅芯片是各种计算机、微电子产品的核心,工业上通过以下反应将自然界的二氧化硅(SiO2)转化为硅(SiO2+2CSi+2CO↑),下列分析正确的是

[ ]

A.二氧化硅发生了氧化反应

B.碳发生了还原反应

C.该反应属于置换反应

D.该反应属于复分解反应

考点:置换反应氧化反应还原反应复分解反应
题型:选择题

阅读理解,判正"T"误"F"。

     I have a happy family. My father is a police officer. He is tall. He likes to play basketball. My mother is

a teacher. She likes to watch TV and read books. I am a pupil. I am a boy. I like to play on the computer.

I am shorter than my father and my mother.

     We like to eat noodles. We like to go for a walk after supper. We are a happy family.

( ) 1. My father is a police officer.

(     ) 2. We like to eat bread.

(     ) 3. My father likes to play football.

(     ) 4. My mother likes to watch TV and read books.

(     ) 5. I like to play on the computer.

题型:选择题

空调可躺式软席客车的构造速度可达()。

A.260km/h

B.160km/h

C.120km/h

D.150km/h

题型:选择题

新生儿乳腺肿大多于何时消退()

A.3~5天后

B.5~7天后

C.7~9天后

D.1~2周后

E.2~3周后

题型:选择题

1995年美国干眼病研究组将干眼症分为以下几类?()

A.水样液缺乏性干眼症

B.泪液蒸发过强性干眼症

C.脂质缺乏性干眼症

D.泪液生成不足性干眼症

E.粘蛋白缺乏性干眼症

题型:选择题

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