China has banned (禁止) free plastic bags at shops and supermarkets, and people have to pay for using
plastic bags. The rule started on June 1st. It came because our country tried to make litter less. Making super-
thin plastic bags has also been banned.
The Chinese once used about 3,000,000,000 plastic shopping bags a day, and they have caused pollution
of the environment. The bags have become a main cause of plastic pollution because they are easy to break and
people throw them away here and there. So the Chinese people are encouraged to bring their own bags for
shopping.
What kind of shopping bag is the best to bring? Some students in chongqing have a good idea. They
make their own shopping bags. They use old clothes to make cloth bags and send to their parents as presents.
They also ask their parents and friends to use cloth bags instead of plastic ones. They think it is their duty to
protect the environment.
B.collect plastic bags in the street
C.pay for using plastic bags at shops and supermarkets
D.use free plastic bags at shops and supermarkets
picture a bicycle? Well, yes, Jason"s human-powered machine, With its two wheels, is, of course, a bicycle.
Every year, a very important humanpowered bicycle is held in Nevada, USA. The speed of a bike is
measured (测定) for only 200-metres, but players take more than a kilometre to get their bikes going fast. Jason
Queally"s fastest speed for the 200metre race was 103.5 kilometres an hour.
At this year"s race, Jason failed to reach the finishing line. He was speeding along at about 70 kilometres
an hour when he began to lose control of his bike. When he tried to slow down, it began to smoke.Soon the
inside of his bike was filled with smoke.He couldn"t see, and he couldn"t breathe. At 70 kilometres an hour, a
crash could be very serious. Jason was frightened, but he managed to stop the bike safely. He would rapair his
bicycle and try again another time to be the world"s fastest man on a bike. Better luck next time, Jason.
Maybe you"re surprised that these bikes go so quickly, but is it useful? It could be. Cars are becoming
more and more popular, and they are very safe, comfortable and easy to drive, but they also pollute the air in
our cities. Scientists and engineers are learning from fast racing bikes how to make human-powered vehicles
that might be uesful for daily travel.
1. Is Jason"s human-powered machine a bicycle?
2. How often is the human-powered bicycle race held in Nevada?
________________________________________________________________
3. Did Jason stop his bike safely or was he badly hurt?
________________________________________________________________
4. Why did he lose this year"s race?
5. What is the best vehicle for daily travel like according to the writer?
________________________________________________________________
Many places in the world need more fresh water. Every country is trying to find ways to turn salt water
into fresh. Why aren"t there many factories like the Symi factory?
In some places, the sun is not hot enough. Or it does not shine every day. In such places, other ways of
heating sea water can be used. These ways cost more money, but they work faster than the sun. By boiling sea
water with high heat, a lot of fresh water can be made quickly.
But heating is not the only way to get fresh water from salt water. Other ways are tried. One way is
freezing. The fresh part of salt water freezes (冷至结冰) first. To get fresh water, the bits of ice are taken out.
Which way is the best? The one that gives the most water for the least money. It may be a different way
for each place.
Symi"s way seems very good for small, hot places. It doesn"t make very much water at a time. But the
factory is easy to build and costs little. That is why people in many dry places talk about Symi!
Scientists are trying to turn deserts into good land again. They want to bring water to the deserts, so
people can live and grow food there. However, more and more land is becoming desert. Why? Scientists think
that people are doing bad things to turn good land into desert.
①地球上的一些地方雨量不足, but they still do not become deserts. This is because green plants are
growing there. Small green plants and grass are very important to dry places. Plants do not let the hot sun
make the earth even drier.②Plants do not let the wind blow the soil away. When rain falls, plants hold the
water.③Without plants, land can become desert much more easily.
1、将①处的汉语译成英文.
2、将②处的英文译成汉语.
3、将③处的英文译成汉语.
4、What should we do in order to protect good land?
life to every living thing. Without it we can not live. Bad air makes people ill. We must have fresh air to
keep us in good health.
In the city there are a great many people and there are too many cars running on the roads. The gas
which the cars spread out is full of poison. Everyday we breathe it in again and again. This makes us feel
sick. Therefore people should go out of door as much as they can.
Besides so many cars, there are many factories too. From the chimneys of these factories, we get the
smoke usually in black or grey colour. This kind of smoke, when it mixes the air, is dangerous to our health.
It is because smoke contains many small poisonous solids and gases. So in order to keep us healthy we have
to go out to the countryside to breathe more fresh air. Or we can go up hills to get more fresh air.
B: Fresh Air
C: Breathing Air
D: The Use of Air
- 1在探究凸透镜成像规律时,小明用9个红色的发光二极管按“F”字样镶嵌排列在白色方格板上替代蜡烛作为光源,又用同样的白色方格
- 2如图所示为观察量筒读数时的四种方法,其中正确的是( )A.B.C.D.
- 3读图,回答题。小题1:甲地为峰林,同类景观多出现在①苏 ②湘 ③滇 ④新 ⑤桂 ⑥内蒙古A.①②B.③④C.③⑤D
- 4比较大小:﹣2( )﹣3(填“<”或“=”或“>”)
- 5下列关于染色体的叙述,不正确的是( )A.染色体是容易被碱性染料染成深色的物质B.真核生物的细胞核内都有一定数量的染色
- 6方程x2+(k-1)y2=k+1表示焦点在x轴上的双曲线,则实数k的取值范围是______.
- 7下列说法错误的是( )A.该绿色食品中不含任何化学物质B.用蒸馏法可从海水中获得淡水C.ag碳和bg氧气完全反应,一定
- 8取一根火柴梗迅速平放入酒精灯火焰中,约1S后迅速取出,观察火柴梗,看到的现象是 _________ .根据这一现象可知,
- 9下列仪器不能用来做反应器的是( )A.量筒B.烧杯C.锥形瓶D.烧杯
- 10请为建设创新型国家设计宣传口号或公益广告。
- 1一节干电池的电压______V,家庭电路的电压______V,人体的安全电压______V.
- 2以下是某课题组设计的合成聚酯类高分子材料 的路线:已知:① A的相对分子质量小于110,其中碳的质量分数约为0.90
- 3方程2x+1=1x的解为x=______.
- 4如图所示电路,开关S闭合后,电压表V1的示数为3.8V,V2的示数为6V。则灯L1两端电压和电源电压分别是[ ]
- 5下面的文字在标点和遣词造句方面存在多处错误,请指出其中五处并改正。 世界自然基金会(WWF)的《点亮东北虎回家之路》雪
- 6我国西北部是重要的产棉区,棉农在种植棉花的过程中要适时适量地施用氮肥,下列肥料中属于氮肥的是( )A.KClB.Ca3
- 7下列实验能达到目的或操作正确的是 ( )A.称量NaO
- 8— Have you called Mr. Johnson’s office? — Yes, he _____ back
- 9如下图所示,下列灭火方法错误的是[ ]A.B.C.D.
- 10已知函数f(x)=logax+1x-1(a>0且a≠1).(1)求f(x)的定义域;(2)判断f(x)的单调性,写出你的