相关知识点: 试题来源: 解析 B。本题考查时态。“The Challenger space shuttle exploded shortly after takeoff”这句话中“exploded”是 explode 的过去式,所以是一般过去时。A 选项是一般现在时;C 选项是现在完成时;D 选项是过去进行时。反馈 收藏
shuttle exploded on Jan. 28 1986 killing all seven astronauts on board. Take-off and re-entry into Earth's atmosphere are the most dangerous parts of a space mission. In 42 years of US' human space flight there had never been an accident in the descent to Earth or landing. Challenger...
and there was no abort option while they were firing. That flame eventually burned through the shuttle’s external tank, rupturing the liquid-hydrogen tank milliseconds before the right booster crashed into the liquid-oxygen tank. The two liquids mixed and exploded, destroying the orbiter with it...
September 17, 1976 - Space Shuttle Enterprise RevealedNASA unveiled its first space shuttle, named Enterprise, at Rockwell International's manufacturing plant in Palmdale, California. The shuttle, which cost $10 billion to develop, marked a significant milestone in the US space program and was revea...
Like the Space Shuttle explosion of 1986. Just because you might have been 4 or you were years from being born, doesn't give you a right not to learn about what happened, and why it exploded. So stop thinking you're not in the same generation as someone born in the 70s because you...
Inflation has just exploded. The real problem is that we have an underlying rate of inflation— an impetus of wages chasing prices—of maybe 9 percent that is heading towards 10 percent. There also have been tremendous shocks in energy, food and housing prices, making it worse. ...
Inflation has just exploded. The real problem is that we have an underlying rate of inflation--an impetus of wages chasing prices--of maybe 9 percent that is heading towards 10 percent. There also have been tremendous shocks in energy, food and housing prices, making it worse. By the end...
Like the Space Shuttle explosion of 1986. Just because you might have been 4 or you were years from being born, doesn't give you a right not to learn about what happened, and why it exploded. So stop thinking you're not in the same generation as someone born in the 70s because you...