[题目]下列关于 NO2跟 H2O反应的说法中.正确的是( ).A．NO2只作氧化剂 B．NO2只作还原剂C．NO2既作氧化剂.又作还原剂 D．NO2既不作氧化剂.又不作还原剂题目和参考答案——青夏教育精英家教网—

题目内容

【题目】下列关于 NO2跟 H2O反应的说法中，正确的是( )。

A．NO2只作氧化剂 B．NO2只作还原剂

C．NO2既作氧化剂，又作还原剂 D．NO2既不作氧化剂，又不作还原剂

【答案】C

【解析】二氧化氮与水反应，生成了硝酸与一氧化氮，氮的化合价既有升高，也有降低，二氧化氮既是氧化剂，又是还原剂。。

练习册系列答案

高分装备期末备考卷系列答案

重点中学与你有约系列答案

绿色成长互动空间决胜中考模拟卷系列答案

A.have come across

B.have come through

C.have come off

D.have come out

【题目】下表为我国部分城市住宅的日照间距，完成下列各题。

【1】

A. ① B. ② C. ③ D. ④

【2】

A. 由南向北逐渐缩小 B. 由南向北逐渐扩大

C. 由西向东逐渐缩小 D. 由西向东逐渐扩大

【题目】C

The production of coffee beans is a huge, profitable business, but, unfortunately, full-sun production is taking over the industry and bringing about a lot of damage. The change in how coffee is grown from shade-grown production to full-sun production endangers the very existence of certain animals and birds, and even disturbs the world’s ecological balance.

On a local level, the damage of the forest required by full-sun fields affects the area’s birds and animals. The shade of the forest trees provides a home for birds and other species(物种)that depend on the trees’ flowers and fruits. Full-sun coffee growers destroy this forest home. As a result, many species are quickly dying out.

On a more global level, the destruction of the rainforest for full-sun coffee fields also threatens(威胁)human life. Medical research often makes use of the forests’ plant and animal life, and the destruction of such species could prevent researchers from finding cures for certain diseases. In addition, new coffee-growing techniques are poisoning the water locally, and eventually the world’s groundwater.

Both locally and globally, the continued spread of full-sun coffee plantations(种植园)could mean the destruction of the rainforest ecology. The loss of shade trees is already causing a slight change in the world’s climate, and studies show that the loss of oxygen-giving trees also leads to air pollution and global warming. Moreover, the new growing techniques are contributing to acidic(酸性的)soil conditions.

It is obvious that the way much coffee is grown affects many aspects of life, from the local environment to the global ecology. But consumers do have a choice. They can purchase shade-grown coffee whenever possible, although at a higher cost. The future health of the planet and mankind is surely worth more than an inexpensive cup of coffee.

【1】What can we learn about full-sun coffee production from Paragraph 4?

A. It limits the spread of new growing techniques.

B. It leads to air pollution and global warming.

C. It slows down the loss of shade trees.

D. It improves local soil conditions.

【2】The purpose of the text is to .

A. entertain B. advertise

C. instruct D. persuade

【3】Where does this text probably come from?

A. An agricultural magazine. B. A medical journal.

C. An engineering textbook. D. A tourist guide.

【4】Which of the following shows the structure of the whole text?

【题目】Hot ___the night air was,we slept deeply because we were so tired after the long journey

A.although

B.as

C.while

D.however

【题目】短文改错(共10小题；每小题l分，满分10分)

假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文。文中共有10处语言错误，每句中最多有两处。每处错误仅涉及一个单词的增加、删除或修改。

增加：在缺词处加一个漏字符号(∧)，并在其下面写出该加的词。

删除：把多余的词用斜线(＼)划掉。

修改：在错的词下画一横线，并在该词下面写出修改后的词。

注意：

1. 每处错误及其修改均仅限一词；

2. 只允许修改10处，多者(从第11处起)不计分。

One day, little Tony went to a shopping center with his parent. It was very crowded. Tony saw a toy on a shop window. He liked it so very much that he quickly walked into the shop. After looks at the toy for some time, he turned around and found where his parents were missing. Tony was scared and begun to cry. A woman saw him crying and telling him to wait outside a shop. Five minutes later, Tony saw parents. Mom said, ＂How nice to see you again! Dad and I were terrible worried.＂ Tony promised her that this would never happen again.

【题目】雾凇，俗称树挂，是在严寒季节里，空气中过于饱和的水汽遇冷凝华而成。2015年12月23日在京密路沿线出现了难得一见的雾凇景观。下图为某网友拍摄的雾凇景观照片。读图，回答下列各题。

【1】利于雾凇形成的主要条件有

①水汽充足 ②风速较大 ③天晴少云 ④日温差小

A．①② B．①③ C．②④ D．③④

【2】观赏该景观的最佳时间是

A．早晨 B．中午 C．下午 D．傍晚

【题目】短文改错(共10小题；每小题l分，满分10分)

增加：在缺词处加一个漏字符号(∧)，并在其下面写出该加的词。

删除：把多余的词用斜线(＼)划掉。

修改：在错的词下画一横线，并在该词下面写出修改后的词。

注意：

1. 每处错误及其修改均仅限一词；

2. 只允许修改10处，多者(从第11处起)不计分。

It is clear shown that many middle school students have physical and mental problems. 68% of the students surveying have studying anxiety as well as poor eyesight too. And a larger percentage lacks sleep. 52% are short of physical exercise. 42% of the students won’t obey our parents or teachers. Personally, I think we student should balance our physical exercise and studies. Without sound body, one can’t achieve anything. However, too much attention has been paid only on studies. As a result, I suggest we are given less homework or more time for out-of-classroom activities. Only in this way can we live a happy and healthy life.

【题目】短文改错(共10小题；每小题l分，满分10分)

增加：在缺词处加一个漏字符号(∧)，并在其下面写出该加的词。

删除：把多余的词用斜线(＼)划掉。

修改：在错的词下画一横线，并在该词下面写出修改后的词。

注意：

1. 每处错误及其修改均仅限一词；

2. 只允许修改10处，多者(从第11处起)不计分。

I still remember the day when I moved my new house 2 years ago. I was busy got my new house in order. It was not easy because I owned over 800 hundreds books. To make matters worse, the new study was smaller than before. When I put my books temporary on the floor, they covered every inch of the floor and I actually had to walk on it to get in or out of the room. Then came my brother to help me put these books in my bookshelf. He went into a room and got surprising when he saw the floor. ＂This is the prettiest carpet I had ever seen,＂ he said. He stared it for some times, adding ＂you don’t need any bookshelf at all. You can let yourself to sit here in your spare time and read your carpet!＂

试题分类