IF 虚拟语气句型：不论主语是单数还是复数，其虚拟语气动词都只能用过去式，be 动词只能用 were。表示与实际情况不一致，亦或表达某种愿望或期望，本句表示与对未来的愿望。注意，现代英语语法也允许使用 be 动词的 was 形式接单数主语。
What will happen to the earth once the sun dies? What is the difference between a bolide and a meteor? Did anyone die from the meteor that hit Chelyabinsk? How big is a meteorite before impact? How did an asteroid impact cause extinction on Earth? What is a super bolide meteor? Was th...
While this may seem like a very small change, it shows that-if a dangerous asteroid was heading toward us-it would be possible to knock it off its course, keeping Earth safe. The chances of Earth actually being hit by an asteroid large enough to cause damage are very small.12. What ...
(4)What can we know about asteroids? BA.Dinosaurs may live on some of them.B.Exploring them helps us know Earth.C.They were formed earlier than Earth.D.NASA's Double Asteroid Redirection Test failed. 答案(1)段落大意题。根据文章第一段By visiting these near Earth obje...
If an asteroid collision could have the potential to obliterate our Earth, what would happen if we had a run-in with another planet? Surprisingly, in some cases, if they collided, they wouldn’t explode or shatter. If one of the planets is young and in what’s referred to as “an emb...
What If an Asteroid Hit Earth?Holly Cefrey
阅读理解 Scientists are worried that an asteroid(小行星)will possibly hit the earth in 2036.If scientists are right planet earth is 24 years away from a major disaster. Scientists h
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Scientists are worried that an asteroid(小行星) will possibly hit the earth in 2036. If scientists are right, planet earth is 24 years away from a major disaster. Scientists have been monitoring the progress of a 390-metre-wide asteroid ever since it was discovered last June. They have anno...
62. What do scientists say about the collision of an asteroid with Earth? A. It is very unlikely but the danger exists. B. Such a collision might happen once every 25 years. C. It’s still too early to say whether such a collision might happen. D. Collisions of asteroids with Earth...