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...
The flight of Challenger on Mission 51L was actually the second of a planned 15 shuttle flights in 1986,coming on the heels of Mission 61C in the first half of January. Following their 28 January launch, the seven-strong crew—Commander Dick Scobee, Pilot Mike Smith, Mission Specialists Ell...
American astronaut Sally Ride took two flights into space aboard the space shuttle Challenger. She was supposed to take a third space flight, but when the Challenger exploded in 1986, shuttle flights were grounded until the cause could be determined. Ride was asked to serve on the committee ...
By January of 1986 America was already bored with spaceflight. It was, in part, NASA’s own fault. The government agency had debuted the space shuttle program five years earlier with an aggressive public-relations message that the reusable vehicles would make access to space both affordable and...
In January of 1986, a small group of engineers cancelled the launch of the Challenger space shuttle. It was not safe to attempt a launch in cold weather. They suspected that the O-rings on the solid rocket booster would not seal properly at freezing temperatures. It was an easy decision ...
What reactor blew up in Chernobyl? What countries were affected by the Chernobyl disaster? Space exploration began when the Soviets launched what? The Space Needle opened in 1962 at what event? What are the worst disasters in world history? What exploded in Chernobyl? What cities were evacuated...
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...
After the space shuttleChallengerexploded 73 seconds after liftoff on the morning of Jan. 28, 1986, investigators discovered that a series of poor decisions led to the deaths of seven astronauts. The day before the launch, engineers from Morton Thiokol, the company that built the solid rocket ...
in the space programme. With the eyes of students across the nation upon her, she might have inspired an entirely new generation of astronauts and space scientists.3 Tragically", she never returned to her classroom 'as the shuttle exploded as引导的原因状语从句just over a minute after taking ...