题目内容
With tiny shops ________ all the streets, the city of Cairo arouses tourists' interest in shopping here.
- A.line
- B.lined with
- C.lining
- D.line along
Gaudi Nanda sees a wearable computer as a handbag --- one that's built out of four-inch squares and triangles of fiber, with tiny computer chips embedded (嵌于) in it. It looks, feels and weighs like your typical leather purse.
That's where the similarities end: this bag can wirelessly keep track of your belongings and remind you, just as you're about to leave the house, to take your wallet. It can review the weather report and suggest that you take an umbrella. This purse can even upload your favorite songs onto your scarf.
Surely, a computing purse and scarf set may seem like the stuff of science fiction. But these devices, part of next generation of wearable computers, could become commonplace within a few years. Dupont created new super strong fibers that can conduct electricity and can be woven into ordinary-looking clothes. And the chipmaker developed chip packaging allowing wearable computers to be washed, even in the heavy-duty (耐磨损的) cycle.
As a result, these new wearable devices are different from the heavy and downright silly versions of the recent past, which often required users to be wrapped in wires and type on their stomachs. Unlike their predecessors, these new wearable computers also make economic sense. When her bag becomes commercially available in two to three years, Nanda expects it will cost around $ 150, which is the price of an average leather purse.
Here's how the bag works: You place a special radio-signal-transmitting chip onto your wallet. A similar radio in your purse picks up the signal and notifies you that you've forgotten to take your wallet. In turn, sensors on your purse's handles will notify the computer that you've picked up the purse and are ready to go.
Already, these new kinds of wearable devices are being adopted for use in markets like auto repair, emergency services, medical monitoring - and even, increasingly, for consumers at large. Indeed, more people will want to cross that bridge in the coming years - making for a booming market for wearable computers that don't look like something out of science fiction.
【小题1】 According to the passage, the new wearable computers _______.
A.require users to operate on the stomach |
B.pick up the signals through wires and chips |
C.are being applied in some different areas now |
D.are smarter but more expensive than the old ones |
A.The new wearable computers have become fashionable. |
B.People would like to learn more about the new computers. |
C.New wearable computers promise to sell well in the future. |
D.The idea of the purse-like computers comes from science fiction. |
A.introduce a new kind of computer |
B.explain the functions of computers |
C.compare different types of computers |
D.show how high technology affects our life |
The huge Florida wetland known as the Everglades is a slow-moving river 80 kilometres wide but only a few centimeters deep. People call the Everglades a “river of grass” because sawgrass covers most of it. Sawgrass is not really grass. It is a plant that has leaves edged with tiny sharp teeth that can easily cut through clothes—and skin!
Travel in the Everglades is difficult. You cannot walk through shallow water because the sawgrass will cut you. The water is too shallow for regular boats. So, we use an airboat. An airboat is a flat, open boat. Like an airplane, it has a big propeller to move it. The propeller is fixed on the rear of the boat. It makes a tremendous noise, but it does the job. The boat skims along the water’s surface. Although we can still get lost in an airboat, at least we are above the alligators(短吻鳄).
While hundreds of different kinds of animals live in the Everglades, the most famous is surely the alligator. Once endangered, alligators are now protected within Everglades National Park. Visitors are likely to see them both on land and in water.
For a long time, dangers have threatened the Everglades. Around 1900, some people felt this precious wetland should be drained (排干). They said it was just a big swamp and not good for anything. In the 1920s, there was a land boom in Florida. People wanted to build homes everywhere, including in the Everglades. They built canals, levees (防洪堤), and other water systems that stopped the rivers flowing into the Everglades. Factories were built near rivers that flowed into the wetland. These factories dumped poisonous waste that damaged the Everglades ecosystem.
?People are now working to preserve the Everglades National Park for the future. Right now, one big problem is the paperbark tree. This tree is an invader from Australia.
Paperbark trees soak up a lot of water. In the early 1900s, people brought them to Florida because they thought they would help drain the Everglades. However, the invaders adapted too well. Paperbark trees have taken over hundreds of thousands of acres of the Everglades and killed other trees. Scientists are cutting down these invaders or spraying them with herbicides (除草剂) to kill them.
【小题1】Which helps to explain why it is difficult to travel in Everglades?
A.Airboats may make a very big noise. |
B.You may get lost when passing through. |
C.Paperbark trees soak up too much water there. |
D.Many different kinds of animals are to be protected. |
A.They have big propellers to move them faster than alligators. |
B.The propeller makes loud noise so as to scare alligators. |
C.Their flat bottom can skim along the water surface. |
D.They can watch alligators without hurting them. |
A.built canals and levees to stop the rivers flowing into Everglades |
B.built factories near rivers that flowed into the wetland |
C.brought Paperbark to soak up water in Everglades |
D.are cutting down these Paperbark trees? |
A.that moves in from another place |
B.that enters and takes control |
C.that has been brought in |
D.that is in danger |
The huge Florida wetland known as the Everglades is a slow-moving river 80 kilometres wide but only a few centimeters deep. People call the Everglades a “river of grass” because sawgrass covers most of it. Sawgrass is not really grass. It is a plant that has leaves edged with tiny sharp teeth that can easily cut through clothes—and skin!
Travel in the Everglades is difficult. You cannot walk through shallow water because the sawgrass will cut you. The water is too shallow for regular boats. So, we use an airboat. An airboat is a flat, open boat. Like an airplane, it has a big propeller to move it. The propeller is fixed on the rear of the boat. It makes a tremendous noise, but it does the job. The boat skims along the water’s surface. Although we can still get lost in an airboat, at least we are above the alligators(短吻鳄).
While hundreds of different kinds of animals live in the Everglades, the most famous is surely the alligator. Once endangered, alligators are now protected within Everglades National Park. Visitors are likely to see them both on land and in water.
For a long time, dangers have threatened the Everglades. Around 1900, some people felt this precious wetland should be drained (排干). They said it was just a big swamp and not good for anything. In the 1920s, there was a land boom in Florida. People wanted to build homes everywhere, including in the Everglades. They built canals, levees (防洪堤) , and other water systems that stopped the rivers flowing into the Everglades. Factories were built near rivers that flowed into the wetland. These factories dumped poisonous waste that damaged the Everglades ecosystem.
? People are now working to preserve the Everglades National Park for the future. Right now, one big problem is the paperbark tree. This tree is an invader from Australia.
Paperbark trees soak up a lot of water. In the early 1900s, people brought them to Florida because they thought they would help drain the Everglades. However, the invaders adapted too well. Paperbark trees have taken over hundreds of thousands of acres of the Everglades and killed other trees. Scientists are cutting down these invaders or spraying them with herbicides (除草剂) to kill them. ?
1.Which helps to explain why it is difficult to travel in Everglades?
A.Airboats may make a very big noise. |
B.You may get lost when passing through. |
C.Paperbark trees soak up too much water there. |
D.Many different kinds of animals are to be protected. |
2.Why do people use airboats instead of normal boats?
A.They have big propellers to move them faster than alligators. |
B.The propeller makes loud noise so as to scare alligators. |
C.Their flat bottom can skim along the water surface. |
D.They can watch alligators without hurting them. ? |
3.The following measures were taken to drain the Everglades except that people______. ?
A.built canals and levees to stop the rivers flowing into Everglades? |
B.built factories near rivers that flowed into the wetland? |
C.brought Paperbark to soak up water in Everglades? |
D.are cutting down these Paperbark trees? |
4.The underlined word "invader" probably means something______. ?
A.that moves in from another place |
B.that enters and takes control? |
C.that has been brought in? |
D.that is in danger? |