题目内容
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Traveling has now become a highly organized business ______.
A．so we can travel anywhere without difficulty
B．because we are provided with all kinds of convenient means for traveling
C．because traveling organizations can be found in the countries the world over
D．so travelers have increased rapidly
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更多“Traveling has now become a hig…”相关的问题
The modern people like traveling now because______.
A. it can bring us more knowledge
B. it can make us rich
C. they have too much money
D. it is a good idea
According to preliminary market surveys, there are 10,000 would-be space tourists willing to spend $1 million each to visit the final frontier. Space Adventures in Arlington have taken more than 130 deposits for a two-hour, $98,000 space tour tentatively set to occur by 2005. This may sound great, but there are a few hurdles: Putting a simple satellite into orbit--with no oxygen, lift: support or return trip necessary—already costs an astronomical $2,200/kg. And that doesn't include the cost of insuring rich and possibly litigious (爱打官司的) passengers. The entire group of entrepreneurs trying to comer the space- tourism market has between them "just enough money to blow up one rocket".
The U.S. space agency has plenty of money but zero interest in making space less expensive for the little guys. So the little guys are racing to do what the government has failed to do: design a reusable launch system that's inexpensive, safe and reliable. Kelly Space's prototype looks like a plane that has sprouted rocket engines. Rotary Rocket in California has a booster with rotors to make a helicopter-style. return to earth. The first passenger countdowns arc still years away, but bureaucrats at the Federal Aviation Administration in Washington arc already informally discussing flight regulations. After all, you can't be too prepared for a trip to that galaxy far, far away.
Which of the following is the best title for the passage？
A．Take Vacations in Space
B．Building Hotels in Space
C．Flight Regulations in Space Travels
D．Cost of Space Traveling
The heated air above a fire rises in a pillar of smoke and burnt gases, pulling fresh air in from the sides to replace it. Firefighters use this fact when they "fight fire with fire." They start a fire well in front of the one which they are fighting. Instead of traveling on in front of the huge fire, the smaller fire is pulled back toward it by the updrafts of the larger blaze. As it travels back to meet the large fire, the smaller backfire burns away the fuel that the forest fire needs to survive.
Even when a backfire has been well set, however, the fire may still win the struggle. The wind which the firefighters used to help them may now become their enemy. When the backfire meets the main fire, before both die for lack of fuel, there is tremendous flame, great heat and wild winds. A strong gust may blow the fire into the treetops beyond the area, giving the fire new fuel and a new life.
This passage focuses on ______.
A．how fires start
B．damage caused by fire
C．the fascination of fire
D．fighting forest fires
A．Because he enjoys traveling from home to office everyday.
B．Because the city air is polluted.
C．Because he doesn't like the crowded houses and strange neighbors in the city.
D．Because he has a romantic feeling about nature.
______ was once regarded as impossible has now become a reality.
A．That
B．Which
C．Who
D．What
Up until now, Queen Elizabeth has ruled in Britain for over __________ decades.
A.three
B.four
C.five
D.six
A.resume
B.continue
C.discontinue
D.suspend
A.has been playing
B.played
C.have played
D.plays
