书写下列反应的文字表达式(或用化学式表示反应): (1)硫单质在空气中燃烧___

题型:填空题

问题:

书写下列反应的文字表达式(或用化学式表示反应):

(1)硫单质在空气中燃烧______.

(2)实验室制取氧气______.

(3)铁丝在氧气中燃烧______.

(4)二氧化碳使澄清石灰水变浑浊______.

上述反应中,属于化合反应的是______(填序号,下同),属于分解反应的是______.

考点:化学反应方程式的书写文字表达式
题型:填空题

下列叙述正确的是( )

A.在氧化还原反应中,肯定有一种元素被氧化,另一种元素被还原

B.没有单质参加的反应一定不是氧化还原反应

C.置换反应一定是氧化还原反应

D.失电子难的原子,容易获得电子

题型:填空题

下列哪项是加剧肾小球硬化的主要因素

A.三高现象

B.中性粒细胞

C.血小板

D.补体

E.内皮细胞

题型:填空题

阅读理解。

     A father's job is unique. If parents had job descriptions, mine would read: organize bills, play dates,

laundry, meals, carpool, snacks and outings. The only thing on my husband's description would be the

word "fun" written in big red letters along the top.

    Our parenting styles complement each other. His style is a nonstop adventure where no one has to

worry about washing their hands, or eating vegetables. I'm too busy worrying to be fun. Besides, every

time I try, I am constantly outdone by my husband.

    I bought my children bubble gumflavored toothpaste, and I taught them how to brush their teeth.  

They thought it was neat until my husband taught them how to rinse(濑口)by spitting out water between

their two front teeth like a fountain.

    I tried singing fun songs as I washed behind my children's ears during bath time. They enthusiastically

sang and clapped until their father came in and taught them how to catapult (弹射) the soap into the sink

with the washcloth.

    I took the children for a nature walk to corral (把……赶入……) a slow ladybug(瓢虫)into my son's

insect cage. I was "cool" until their father came home, spent two minutes in the backyard, and captured

a beetle the size of a Chihuahua (吉娃娃,一种产于墨西哥的狗).

     I try to tell myself I am a good parent even if my husband does things I can't do. I can make sure my

children are safe. But I can't wire the VCR so my children can't watch their favourite video.

     I can carry my children in my arms when they are tired and kiss them good night. But I can't flip

them upside down so they can walk on the ceiling or prop them on my shoulders so they can see the

moths flying inside the light fixture.

     I can take them to doctor appointments, but I'll never go into the wilderness to fish. I'll even sit in the

first row of every Little League game, but I'll never teach my children how to hit a home run or slide into

first base.

     I can do a lot of things for my children, but no matter how hard I try, I can never be their father.

1. What's the job of the mother in the passage?

A.  Looking after children,  going shopping and doinghousework.

B. Going shopping and sending her children to school.

C.  Playing with her children and going to school with them.

D. Working in the office and taking care of her children and husband.

2. The father will do the following EXCEPT   ________ according to the passage.

A. going wild to fish with the children

B. making appointments with doctors

C. flipping the children upside down

D. teaching the children how to hit a home run

3. What's the best title for the passage?

A. Mothers Have a Unique Job

B. Children Are Very Important

C. Fathers Have a Unique Job

D. Parents Have Gentle Children

题型:填空题

形成性评价在音乐教学中具有()作用。

A.反馈

B.审美

C.娱乐

D.认识

题型:填空题

阅读下列说明,回答问题1至问题4,将解答填入答题纸的对应栏内。【说明】某出版社要制作一批电子出版物,主要工作是将原始的一些纸质文档数字化,并利用多媒体软件制作成多媒体光盘的形式发行,其制作的基本流程图如图14-3所示。

目前制作多媒体作品的软件主要有两种类型:专门的多媒体制作工具和高级语言。试分析这两种工具的特点,并指出该出版社应该选用哪种类型的工具。

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