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
These activities greatly lessened (and then ceased) after the Challenger space shuttle explosion of 1986, when it became clear that space shuttles could only launch a few times a year instead of many. There was a concern that the astronauts were doing risky spacewalks. As well, military satell...
When the Space Shuttle Challenger exploded on January 28, 1986, millions of Americans became bound together in a single, historic moment. Many still vividly remember exactly where they were and what they were doing when they heard about the tragedy. In Diane Vaughan recreates the steps leading ...
The space shuttle Challenger — during its 10th launch – on Jan. 28, 1986, exploded 73 seconds after liftoff, killing all seven crewmembers and changingNASA'sspace program forever. Challenger was the secondshuttleto reach space, in April 1983. It successfully completed nine milestone missions du...
FOCUS: STORM CLOUDS AT NASA NOT SINCE THE SPACE SHUTTLE CHALLENGER EXPLODED IN 1986 HAS NASA HAD SUCH A BAD YEAR. HAS THE BUDGET-CUTTING SEVERELY HAMPERED THE SPACE AGENCY, OR ARE THE PROBLEMS MERELY A STRING OF BAD LUCK? EITHER WAY, AT LEAST ONE OF THE ASTRONAUTS IS LEERY ABOUT HIS ...
It was the first in-flight disaster in 56 manned space missions and the first to claim the lives of Americans. Cries of horror went up at viewing sites along the coast when the shuttle exploded at 10:39 am Chicago time. STS-51-L Challenger at liftoff ...
It was almost 17 years to the day that the Challenger 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 ...
It was almost 17 years to the day that the Challenger shuttle exploded on Jan 28, 1986, killing all seven astronauts on board. Take-off and reentry 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...
When the space shuttle Challenger exploded on January 28, 1986, speculation about the cause of the disaster was frenzied. The last thing anyone wanted to believe was that the tragedy could be the result of willful human negligence. However, extensive evidence supporting such a view came out imme...
In 1986 a space shuttle exploded. It was The Challenger. Lots of people saw it on television. Itwent upfrom The Kennedy Space Centre in Florida in the United States at 11: 38 A.M. After 73 seconds people saw flames. Seven astronauts died. One of the astronauts was a teacher! Now, ...