美国《科学》杂志每年评选一种在研究上取得突出进展的分子(Molecule of the year),人们称“明星分子”.其中,1992年评选出由一个氮原子和一个氧原子结合而成的简单分子,在控制人体血压、肠胃、人脑学习方面具有特殊生理功能.在通常状态下,它是一种无色的气体,在空气中极易与氧气反应生成一种红棕色的二氧化氮气体.
(1)请写出这种简单分子的化学式
NO
NO
,其名称是
一氧化氮
一氧化氮

(2)写出其物理性质是:
在通常状态下,是无色的气体
在通常状态下,是无色的气体

(3)写出其化学性质是:
在空气中极易与氧气反应生成二氧化氮
在空气中极易与氧气反应生成二氧化氮

(4)指出它的一种用途:
在控制人体血压、肠胃、人脑学习方面具有特殊生理功能
在控制人体血压、肠胃、人脑学习方面具有特殊生理功能

(5)写出这种气体与氧气反应的化学方程式:
2NO+O2═2NO2
2NO+O2═2NO2

(6)请你用一个实验证明它是否可溶于水,所需要的实验仪器有:
集气瓶、水槽(试管、烧杯)
集气瓶、水槽(试管、烧杯)

(7)若实验桌上还有一瓶这种气体,根据所给的信息,你还想探究它的什么性质,请说出你的实验方案:
想探究它是否与氧气反应.把集气瓶口的玻璃片移开,观察瓶口是否产生红棕色气体.
想探究它是否与氧气反应.把集气瓶口的玻璃片移开,观察瓶口是否产生红棕色气体.
Psychology(心理学)tells us that many people hate to take risks. But it is good for us to take risks, especially (尤其)when the risk is to achieve a desired result. In that way, we become stronger and braver.
Our human nature should be to take risks, but some people just sit and wish they didn’t have the fear(恐惧)to move on. This is because of one or two failures in their lives. Please step out and don’t let the past hold you back from living life to the fullest. Move forward and move on!
In studying the psychology of taking risks, we find that human nature provides(提供) us with the desire (渴望)to experiment and take chances.
Risk taking is a great benefit(好处)that allowed our ancestors(祖先) to become stronger and stronger day by day. By taking risks they fought off enemies and discovered new territories(领土). This attitude has become a part of our modern culture. Riding a roller coaster is a common risk taking activity that even the average person seems to enjoy although they have the understanding that it is dangerous. This psychological and biological (生物学上的) connection (联系)creates an interesting connection between what is unsafe and what humans enjoy.
Getting in a car each day is a risk. Getting out of bed is a risk. There is such thing as perfect safety. We need to take risks so that we can finish many things. Astronauts take risks when they get inside a rocket; however, the things they achieve are great. Businessmen take a risk when they buy parts of a company. However, without doing that, they could not make more money.
We need to take risks so that we can gain something. It is impossible to move forward in life, earn money, enjoy a relationship, play a sport, or do anything else without taking a risk. It is all part of the game. It’s one of the most important parts of life.
【小题1】Some people don’t want to take risks, mainly (主要)because ___________.
A.they are too lazy to move on
B.they feel pleased with the present life.
C.they have experienced some failures before
D.they show little interest in the strange world outside
【小题2】 What does the underlined part “This attitude” in Paragraph 4 mean?
A.Taking risksB.Fighting off enemies
C.Discovering new territories D.Becoming stronger and stronger
【小题3】 What can we infer from the passage?
A.Daily life is full of risks
B.The safest place has the greatest risk
C.People should take risks when they are young
D.We can always achieve our goals by taking risks
【小题4】What would be the title for the passage?
A.Taking risks is easier said than doneB.On risks taken by ancestors
C.Live our life to the fullest(充分地)D.No risk, no gain.
Psychology(心理学)tells us that many people hate to take risks. But it is good for us to take risks, especially (尤其)when the risk is to achieve a desired result. In that way, we become stronger and braver.
Our human nature should be to take risks, but some people just sit and wish they didn’t have the fear(恐惧)to move on. This is because of one or two failures in their lives. Please step out and don’t let the past hold you back from living life to the fullest. Move forward and move on!
In studying the psychology of taking risks, we find that human nature provides(提供) us with the desire (渴望)to experiment and take chances.
Risk taking is a great benefit(好处)that allowed our ancestors(祖先) to become stronger and stronger day by day. By taking risks they fought off enemies and discovered new territories(领土). This attitude has become a part of our modern culture. Riding a roller coaster is a common risk taking activity that even the average person seems to enjoy although they have the understanding that it is dangerous. This psychological and biological (生物学上的) connection (联系)creates an interesting connection between what is unsafe and what humans enjoy.
Getting in a car each day is a risk. Getting out of bed is a risk. There is such thing as perfect safety. We need to take risks so that we can finish many things. Astronauts take risks when they get inside a rocket; however, the things they achieve are great. Businessmen take a risk when they buy parts of a company. However, without doing that, they could not make more money.
We need to take risks so that we can gain something. It is impossible to move forward in life, earn money, enjoy a relationship, play a sport, or do anything else without taking a risk. It is all part of the game. It’s one of the most important parts of life.
【小题1】Some people don’t want to take risks, mainly (主要)because ___________.
A.they are too lazy to move on
B.they feel pleased with the present life.
C.they have experienced some failures before
D.they show little interest in the strange world outside
【小题2】 What does the underlined part “This attitude” in Paragraph 4 mean?
A.Taking risksB.Fighting off enemies
C.Discovering new territories D.Becoming stronger and stronger
【小题3】 What can we infer from the passage?
A.Daily life is full of risks
B.The safest place has the greatest risk
C.People should take risks when they are young
D.We can always achieve our goals by taking risks
【小题4】What would be the title for the passage?
A.Taking risks is easier said than doneB.On risks taken by ancestors
C.Live our life to the fullest(充分地)D.No risk, no gain.
Psychology(心理学)tells us that many people hate to take risks. But it is good for us to take risks, especially (尤其)when the risk is to achieve a desired result. In that way, we become stronger and braver.
Our human nature should be to take risks, but some people just sit and wish they didn’t have the fear(恐惧)to move on. This is because of one or two failures in their lives. Please step out and don’t let the past hold you back from living life to the fullest. Move forward and move on!
In studying the psychology of taking risks, we find that human nature provides(提供) us with the desire (渴望)to experiment and take chances.
Risk taking is a great benefit(好处)that allowed our ancestors(祖先) to become stronger and stronger day by day. By taking risks they fought off enemies and discovered new territories(领土). This attitude has become a part of our modern culture. Riding a roller coaster is a common risk taking activity that even the average person seems to enjoy although they have the understanding that it is dangerous. This psychological and biological (生物学上的) connection (联系)creates an interesting connection between what is unsafe and what humans enjoy.
Getting in a car each day is a risk. Getting out of bed is a risk. There is such thing as perfect safety. We need to take risks so that we can finish many things. Astronauts take risks when they get inside a rocket; however, the things they achieve are great. Businessmen take a risk when they buy parts of a company. However, without doing that, they could not make more money.
We need to take risks so that we can gain something. It is impossible to move forward in life, earn money, enjoy a relationship, play a sport, or do anything else without taking a risk. It is all part of the game. It’s one of the most important parts of life.
【小题1】Some people don’t want to take risks, mainly (主要)because ___________.
A.they are too lazy to move on
B.they feel pleased with the present life.
C.they have experienced some failures before
D.they show little interest in the strange world outside
【小题2】 What does the underlined part “This attitude” in Paragraph 4 mean?
A.Taking risksB.Fighting off enemies
C.Discovering new territories D.Becoming stronger and stronger
【小题3】 What can we infer from the passage?
A.Daily life is full of risks
B.The safest place has the greatest risk
C.People should take risks when they are young
D.We can always achieve our goals by taking risks
【小题4】What would be the title for the passage?
A.Taking risks is easier said than doneB.On risks taken by ancestors
C.Live our life to the fullest(充分地)D.No risk, no gain.
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