【Eric Chang】評論

請修改題目為46 How many other craters of a dimension similar to the one in southern Mexico areknown to people? (A)3  (B) 2 (C) 1 (D)4

【pinjia】評論

【【站僕】摩檸Morning】評論

原本題目:請依下文回答第 44 題至第 47 題 Some 66m years ago Earth was hit by a space rock reckoned to have been 10km across. The resulting chaoscaused the extinction of dinosaurs and many other species, opening the way for the age of mammals－and ultimatelyhumans. It also left a big hole in what is now southern Mexico. That hole is one of only three known of similardimensions (the other two are Vredefort in South Africa and Sudbury in Canada). And this is odd. For, during thebillions of years that Earth has had a solid crust, many more than three big asteroids might have been expected to h...