Section B
Directions: There are 2 passages in this section. Each passage is followed by some questions or unfinished statements. For each of them there are four choices marked A, B, C and D. You should decide on the best choice.
When Mike Kelly first set out to build his own private space-ferry service, he figures his bread-and-butter business would be lofting satellite into high-earth orbit. Now he thinks he may have figured wrong. "People were always asking me when they could go," says Kelly, who runs Kelly Space & Technology, "I realized the real market is in space tourism."
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 has 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, life support or return trip necessary—already costs an astronomical $22,00/kg. And that doesn't in elude the cost of insuring rich and possibly litigious passengers. The entire group of entrepreneurs trying to corner the space-tourism market have 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 are still years away, but bureaucrats at the Federal Aviation Administration in Washington are 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
第1题
延长动作电位时程的抗心律失常药
A、胺碘酮
B、普萘洛尔
C、利多卡因
D、苯妥英钠
E、奎尼丁
第5题
适度阻滞钠通道的抗心律失常药是()。
A、奎尼丁
B、利多卡因
C、普萘洛尔
D、胺碘酮
E、地尔硫
第6题
轻度阻滞钠通道的抗心律失常药是()。
A、奎尼丁
B、利多卡因
C、普萘洛尔
D、胺碘酮
E、地尔硫
第8题
选择性延长动作电位时程的抗心律失常药是()
A.胺碘酮
B.维拉帕米
C.普萘洛尔
D.奎尼丁
E.利多卡因
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