题目内容
___________ human being(人类), fish live in water.
- A.Different
- B.Difficult
- C.Unlike
- D.Unlike with
Is the world too crowded? Well, that’s a hard question to answer. It’s all a matter of perspective(视角).In Montana, you might drive for a mile in any direction and not see another human being. In Macao, 60,000 people live in every square mile!
What is true is that the world’s population doesn’t stay the same. It has been increasing at a very fast rate(比例).That’s in part because in each generation(代) these are more people who then have children than in the last generation.
Five hundred years ago, the population of the world was about 460 million. In 1900,the world’s population was under 2 billion(十亿).Right now it is doubling every 40 years. That means, if this rate of growth continues, when you are a parent, there will be twice as many people on earth as there are now. Wow! Now that’s a whole lot of people! Soon the world’s population will probably reach 7 billion. Some people worry about that! But there is a lot of disagreement about just how many people on earth equals(相当于) too many people. But everyone agrees that the more people there are, the more resources(资源) the world needs to feed, house and take care of all of them, and the more need there is to think carefully about how we live and use the earth’s resources.
【小题1】From the first paragraph we can know that ________.
| A.Montana is too crowded |
| B.Macao is too crowded |
| C.the world is too crowded |
| D.the world is not too crowded |
| A.people live longer than before |
| B.there are less wars than before |
| C.medicine is developing faster than before |
| D.more couples now would like to have children than before |
| A.450 million. | B.about 2 billion. |
| C.40 billion. | D.7 billion. |
| A.find more resources |
| B.use more resources |
| C.think about our ways of living |
| D.move to other places |
| A.thinks the world already has too many people |
| B.thinks the world can feed no more than 7 billion people |
| C.is not sure when the world’s population will reach 7 billion |
| D.is not sure what the largest population that the world can feed is |
Every year landslides cause 25 to 50 deaths and $2 billion in damage in the United States. And in December, a single event killed more than 2000 people in the Philippines. Sending workers to stabilize mountainsides using steel bars can help a lot, but it introduces new difficulties because of dust and loosen heavy, dangerous debris from the work. “It’s a quite dangerous job,” says Giorgio Pezzuto of D’ Appolonia, working with eight other companies. Now there may be an answer: a three-ton robot called Roboclimber.
“The idea is to operate a machine far away that can do the stabilizing job without a human being near,”says Pezzuto, manager for the project, which is supported by a European organization. Engineers say that the machine will be faster and cheaper than manual labor. The robot, a large radio-controlled four-legged spider, has cost at least $2 million so far. It should be able to climb mountainsides, drill holes and insert steel bars there. Testing should begin in May.
【小题1】The underlined word “event” refers to_____
| A.earthquake | B.debris | C.dust | D.landslide |
| A.to tell people how serious the damage caused by landslides is |
| B.to tell people that sending workers to stabilize mountainsides is a dangerous job |
| C.to show people how to use a new robot |
| D.to introduce a new robot that can be used to stabilize mountainsides |
| A.human being | B.spider | C.steel bar | D.a drill |
| A.25 to 50 deaths | B.more than 2000 people died |
| C.$2 billion | D.both A and C |
| A.it will be faster and cheaper than manual labor |
| B.it can climb mountainsides, drill holes and insert steel bars there. |
| C.it can do the stabilizing job without human beings near |
| D.it is like a spider |