题目内容
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[主观题]
A3 × × will fly faster while consuming less oil. 查看
材料
A.Right
B.Wrong
C.Not mentioned
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题目内容
（请给出正确答案）
如果结果不匹配，请 联系老师 获取答案
题目内容
（请给出正确答案）
A.Right
B.Wrong
C.Not mentioned
如果结果不匹配，请 联系老师 获取答案
更多“A3 × × will fly faster while c…”相关的问题
Pigeons have been known to fly as fast as ______.
A．75 mph
B．50 mph
C．110 mph
D．62 mph
The passage uses "a bow and arrow" as an example to show______.
A．how an arrow gets so much energy to fly
B．why the trap-jaw ants have springy system
C．why the trap-jaw ants" jaws move so fast
D．how a bow and arrow works
What does Werner J, A. Dahm say about the Hyper-X test flight？
A．It was unsuccessful because it lasted only 11 seconds.
B．It is a very important event in developing very fast airplanes.
C．It allows people to fly at an altitude of 100,000 feet.
D．It can transport cargo quickly and cheaply to outer space.
34 What does Werner J．A．Dahm say about the Hyper-X test flight？
A It was unsuccessful because it lasted only 11 seconds．
B It is a very important event in developing very fast airplanes．
C，It allows people to fly at an altitude of 100,000 feet．
D It can transport cargo quickly and cheaply to outer space．
听力原文：M: Are you looking forward to your trip to Canada？
W: I can't wait to see Canada, but I'm scared stiff of the journey. My husband insists on flying, but I want to sail. Planes make me nervous.
M: There's nothing to be frightened of. How many planes fly across the Atlantic every day？
W: I've no idea. Hundreds, I suppose.
M: And how often do you hear of a crash？ ... Once or twice a year？
W: Yes, but planes fly so high and fast that once is enough.
M: Look, there are more road casualties per day than air deaths per year. Air transport is really safe compared with road transport.
W: I'd still prefer to go by sea. Ships may not travel fast but at least you can relax; I'd love a trip on a luxury liner like the Queen Elizabeth Ⅱ.
M: It's fine if you are a good sailor, but have you ever traveled far in a rough sea？
W: No, I've only bean in a boat once. I sailed down the River Thames on a sightseeing tour But in any case I'd rather be sea-sick than dead.
(20)
A．The woman.
B．Her husband.
C．The woman and her husband.
D．The woman and her friend.
听力原文：M: Are you looking forward to your trip to Canada, Julie？
W: I can't wait to see Canada, but I'm scared of the journey. My husband insists on flying, but I want to sail. Planes make me nervous.
M: There's nothing to be frightened of. How many planes fly across the Atlantic every day？
W: I've no idea. Hundreds, I suppose.
M: And how often do you hear of a crash？ ... Once or twice a year？
W: Yes, but sere planes fly so high and fast flint once is enough.
M: Look, there are more mad casualties per day than air deaths per year. Air transport is really safe compared with road transport.
W: I'd still prefer to go by sea. Ships may not travel fast, but at least you can relax, I'd love a trip on a luxury liner like the Queen Elizabeth Ⅱ.
M: It's fine ff you're a good sailor, but have you ever traveled far in a rough sea？
W: No. I've only been in a boat once. I sailed down the River Thames on a sightseeing tour... But in any case, I'd rather be seasick than dead.
(20)
A．The transportation of the trip.
B．The air-sick.
C．The sea-sick.
D．The quarrel between a couple.
听力原文：M: Are you looking forward to your trip to Canada, Susan？
W: I can't wait to see Canada, Jason, but I'm scared stiff of the journey. My husband insists on flying, but I want to sail. Planes make me nervous.
M: There's nothing to be frightened of. How many planes fly across the Atlantic every day？
W: I've no idea. Hundreds, I suppose.
M: And how often do you hear of a crash？ Once or twice a year？
W: Yes, but aero-planes fly so high and fast that once is enough.
M: There are more road accidents per day than air deaths per year. Air transport is really safe compared with road transport.
W: I still prefer to go by sea. Ships may not travel fast but as least you can relax. I'd love a trip on a luxury liner like the Queen Elizabeth II.
M: It's fine if you're a good sailor, but have you ever traveled far in a rough sea？
W: No. I've only been in a boat once. I sailed down the River Thames on a sightseeing tour, but in any case I'd rather be sea-sick than dead.
What is the woman afraid of when she takes her trips？
A．Taking a voyage.
B．Taking a train.
C．Taking a flight.
听第9段材料，回答第15～17题。
Text 9
M: Are you looking forward to your trip to Canada, Susan？
W: I can't wait to see Canada, Jason, but I'm scared stiff of the journey. My husband insists on flying, but I want to sail. Planes make me nervous.
M: There's nothing to be frightened of. How many planes fly across the Atlantic every day？
W: I've no idea. Hundreds, I suppose.
M: And how often do you hear of a crash？ Once or twice a year？
W: Yes, but aero-planes fly so high and fast that once is enough.
M: There are more road accidents per day than air deaths per year. Air transport is really safe compared with road transport.
W: I still prefer to go by sea. Ships may not travel fast but as least you can relax. I'd love a trip on a luxury liner like the Queen Elizabeth II.
M: It's fine if you're a good sailor, but have you ever traveled far in a rough sea？
W: No. I've only been in a boat once. I sailed down the River Thames on a sightseeing tour, but in any case I'd rather be sea-sick than dead.
What is the woman afraid of when she takes her trips？
A. Taking a voyage.
B. Taking a train.
C. Taking a flight.
听力原文： What does maglev look like？ Japanese engineers designed a vehicle that runs in a cradle-like track or guideway. Magnetic attraction and repulsion pull and push maglev forward. To stop the trains, the magnetic force is reversed, much like airplanes are stopped by reversing the force of the engines. Both types of maglev are quiet, fast, and save. Since maglev rides on air, there is no friction between wheels and rails to make noise or to slow it down. If the external power fails, there is a battery-operated system on the train itself that takes over and brings the cars to a smooth stop.
Maglev could be the answer to our problems. It could become the typical short and middle-distance mass transportation system of the twenty-first century. If it does, we will enjoy many benefits. We will ride in save, fast, quiet trains between cities up to about 500 miles apart in less time than it takes to fly if you include the time for ground transportation. We will conserve precious land because maglev can be built where railroads run, down the middle of existing super-highways or elevated above existing streets and roads. And we will probably save money, too. According to a German estimate, a mile of two-way track will cost about nine million dollars whereas a mile of interstate highway costs about 25 million dollars in the United States.
(30)
A．Because it is designed like a cradle.
B．Because it is pulled and pushed by magnetic attraction and repulsion.
C．Because it runs on air.
D．Because there's no friction between wheels and rails.
EA wind tunnel (风洞) is used for teasing planes or plane models. In a wind tunnel air is blown over a plane or a model placed in a test section (区).Wind tunnel test sections are different in size depending on airflow speed requirements. Some low-speed tunnels have test sections large enough for a complete small plane. In the very high speed tunnels used for space testing, however, the model may be as small as a pencil.
There are two ways of feeding air to the test section. In the constant flow tunnel, airflow is produced by electric fans. It is forced through the tunnel to the test section, then through another tunnel section back to the starting point for reuse.
The other way involves (卷入) storing high-pressure air in a box, sending it out by a controlling device (装置) to pass through the tunnel and test section into another box. This way is usually used for a very short period of high-speed airflow.
Wind tunnels are usually used to test planes before they are flown. Problems in a plane can be found when it meets the high-speed airflow in the tunnel. For example, if the wings are built so that they would weaken (become weak) at high speeds, this fact can be discovered in the tunnel, saving many lives and millions of dollars.
In a wind tunnel, scientists also find out how different planes will act different speeds. They find out such things as how the air dives by the wing surfaces, how slowly a plane can fly before it starts to drop, and how fast it can climb.
第52题：Some wind tunnel sections are larger than others because ________.
[A] they are used large planes
[B] stronger wind can be produced in them
[C] they are built to meet a higher speed test
[D] the wind used in them flows at a lower speed
