（）is the volume for loading goods of the vehicle.

A:Vehicle tonnage B:Vehicle size C:Vehicle capacity D:Available Vehicle capacity

（）is the volume for loading goods of the vehicle.

A:Vehicle tonnage B:Vehicle size C:Vehicle capacity D:Available vehicle capacity

As in the field of space travel, so in undersea exploration new technologies continue to appear. They share a number of similarities with each other — as well as some important differences.
Manned submersibles (潜水器), like spaceships, must maintain living conditions in an unnatural environment. But while a spaceship must simply be sealed against the vacuum of space, a submersible must be able to bear extreme pressure if it is not to break up in deep water.
In exploring space, unmanned vehicles were employed before astronauts. In undersea exploration, on the other hand, men paved the way, only recently have unmanned remote-operated vehicles (ROVs) been put to use.
One reason for this is that communicating with vehicles in orbit is much easier than talking to these underwater. A vacuum am ideal medium for radio communications, but underwater communications are limited to much slower sound waves. Thus, most undersea vehicles—particularly ROVs— operate at the end of long ropes.
For a similar reason, knowing where you are undersea is much more difficult than in space. A spaceship’s position can be located by following its radio signal, or by using telescopes and radar. For an undersea vehicle, however, a special network of sonar (声纳) must be laid out in advance on the ocean’ floor in the area of a dive to locate the vehicle’s position.
Though undersea exploration is more challenging than outer space in a number of respects, it has a distinct advantage: Going to the ocean depths doesn’t require the power necessary to escape Earth’s gravity. Thus, it remains far less expensive.

The sonar devices must be placed （　）.

A:from time to time B:after the undersea vehicle dives C:at the time when the undersea vehicle is diving D:before the undersea vehicle dives

Inspecting a Used Car
The scariest part of buying a used car is not being completely sure of what condition it’s in. A car that’s been in a major accident is always a bigger risk, but sellers often try to hide this information. Andrew Bleakley, evaluator-inspector, runs a mobile vehicle inspection service in Montreal. For about $ 80 he will perform a full, unbiased inspection on a used vehicle’. In his 10 years as a professional inspector, Bleakl’ey has seen a lot. He warns. "Watch out for dealer demonstration vehicles which are used, not new. They may have been in a collision." He adds that it is not uncommon in Ontario and Quebec especially for unscrupulous sellers to roll back the odometer or to even disengage it. Bleakiey has special tools to check for this.
Bleakley always recommends hiring all independent technician to inspect the condition of a. used car before you buy it. The problem is finding someone qualified to do the inspection. Which he says generally doesn’t mean just any mechanic. A thorough mechanical inspection includes checking the compression, all major systems, including the engine, electrical and charging systems, transmission and drive line, fluids, brakes, suspension, and steering. Essential, too, is all inspection of the car’s body and finally a road test. There are, however, a few things everyone can do before buying a used car:
Do a visual check of the car. Look at the right rear door hinges. If they are very worn, or the door doesn’t close well, the car may have been used as a taxi. Holes in the roof could mean the car was used for deliveries.
Check for oil leaks on the pavement. Note that leaks are not necessarily a significant problem— it depends on the cause.
Don’t assume that new looking brake and accelerator pedals mean the car hash’t been driven much. Resellers know people check these details and can buy new pads for around $ 6.
Copy down the vehicle’ identification number (VIN). a 17-character combination of numbers and letters, from the vehicle’s dashboard. In Ontado, ask the dealer or seller for the Used Vehicle Information Package. This gives details of previous owners, any outstanding liens on the car, and the fair market value of the vehicle.
collision n. 碰撞；碰撞事故 odometer n.里程表 compression n. 压缩；压缩量 pedal n.踏脚 lien n. 扣押权 unscrupulous adj.不择手段的 disengage v. 松开；使脱离 transmission n.传输 suspension n.悬架 hinge n.铰链 dashboard n.仪表板

According to the passage, from which of the following can the buyer obtain reliable information of the previous owner（　）

A:The vehicle identification number. B:The unbiased inspector. C:The second-hand car dealer. D:The used Vehicle Information Package.

{{B}}第二篇{{/B}}

The sonar devices must be placed ______.

A:from time to time B:after the undersea vehicle dives C:at the time when the undersea vehicle is diving D:before the undersea vehicle dives

{{B}}第三篇{{/B}}

According to the passage, from which of the following can the buyer obtain reliable information of the previous owner?

A:The vehicle identification number. B:The unbiased inspector. C:The second-hand car dealer. D:The used Vehicle Information Package.

Inspecting a Used Car
The scariest part of buying a used car is not being completely sure of what condition it’s in. A car that’s been in a major accident is always a bigger risk, but sellers often try to hide this information. Andrew Blealdey, evaluator-inspector, runs a mobile vehicle inspection service in Montreal. For about $ 80 be will perform a full, unbiased inspection on a used vehicle. In his 10 years as a professional inspector, Bleakley has seen a lot. He warns "Watch out for dealer demonstration vehicles which are used not new. They may have been in a collision." He adds that it is not uncommon in Ontario and Quebec especially for unscrupulous sellers to roll back the odometer or to even disengage it. Bleakiey has special tools to check for this.
Bleakley always recommends hiring all independent technician to inspect the condition of a used car before you buy it. The problem is finding someone qualified to do the inspection. Which he says generally doesn’t mean just any mechanic. A thorough mechanical inspection includes checking the compression, all major systems, including the engine, electrical and charging systems, transmission and drive line, fluids, brakes, suspension, and steering. Essential, too, is all inspection of the car’s body and finally a road test. There are, however, a few things everyone can do before buying a used Car:
Do a visual check of the car. Look at the right rear door hinges. If they are very worn, or the door doesn’t close well, the car may have been used as a taxi. Holes in the roof could mean the car was used for deliveries.
Check for oil leaks on the pavement. Note that leaks are not necessarily a significant problem-- it depends on the cause.
Don’t assume that new 100 king brake and accelerator pedals mean the car hash’t been driven much. Resellers know people check these details and can buy new pads for around $ 6.
Copy down the vehicle identification number (VIN), a 17-character combination of numbers and letters, from the vehicle’s dashboard. In Ontado, ask the dealer or seller for the Used Vehicle Information Package. This gives details of previous owners, any outstanding liens on the car, and the
fair market value of the vehicle.
collision n.碰撞；碰撞事故
odometer n.里程表
compression n.压缩；压缩量
brake n．刹车
pedal n．踏脚
lien n，扣押权
unscrupulous adj.办不择手段的
disengage v.松开；使脱离
transmission n．传输
suspension n，悬架
hinge n，铰链
dashboard n．仪表板
According to the passage, from which of the following can the buyer obtain reliable information of the previous owner

A:The vehicle identification number. B:The unbiased inspector. C:The second-hand car dealer. D:The used vehicle information packag

The scariest part of buying a used car is not being completely sure of what condition it’s in. A. car that’s been in a major accident is always a bigger risk, but sellers often try to hide this information. Andrew Bleakley, evaluator-inspector, runs a mobile vehicle inspection service in Montreal. For about $ 80 he will perform a full, unbiased inspection on a used vehicle, In his 10 years as a professional inspector, Bleakley has seen a lot. He warns , "Watch out for dealer demonstration vehicles which are used, not new. They may have been in a collision. " He adds that it is not uncommon in Ontario and Quebec especially for unscrupulous sellers to roll back the odometer or to even disengage it. Bleakley has special tools-to check for this.
Bleakley always recommends hiring an independent technician to inspect the condition of a used car before you buy it. The problem is finding someone qualified to do the inspection, which he says generally doesn’t mean just any mechanic. A. thorough mechanical inspection includes checking the compression, all major systems, including the engine, electrical and charging systems, transmission and drive line, fluids, brakes, suspension, and steering. Essential, too, is an inspection of the car’s body and finally a road test. There are , however, a few things everyone can do before buying a used car:
Do a visual check of the car. Look at the right rear door hinges. If they are very worn, or the door doesn’t close well, the car may have been used as a taxi. Holes in the roof could mean the car was used for deliveries.
Check for oil leaks on the pavement. Note that leaks are not necessarily a significant problem—it depends on the cause.
Don’t assume that new-looking brake and accelerator pedals mean the car hasn’t been driven much. Resellers know people check these details and can buy new pads for around $ 6.
Copy down the vehicle identification number (VIN), a 17-character, combination of numbers and letters, from the vehicle’s dashboard. In Ontario, ask the dealer or seller for the Used Vehicle Information Package. This gives details of previous owners, any outstanding liens on the car, and the fair market value of the vehicle.
According to the passage, from which of the following can the buyer obtain reliable information of the previous owner ______

A:The vehicle identification number. B:The unbiased inspector. C:The second-hand car dealer. D:The Used vehicle Information Packag

若已定义了类Vehicle，则下列派生类定义中，错误的是

A:class Car：Vehicle｛／＊类体略*／｝， B:class Car：public Car｛／＊类体略＊／｝； C:class Car：public Vehicle｛／＊类体略＊／｝； D:class Car：virtual public Vehicle｛／＊类体略＊／｝；

若已定义了类Vehicle，则下列派生类定义中，错误的是（）。

A:class Car：Vehicle{/*类体略*/}， B:class Car：public Car{/*类体略*/}； C:class Car：public Vehicle{/*类体略*/}； D:class Car：virtual public Vehicle{/*类体略*/}；