How Did Life Begin on Earth?Mariette DiChristina
解析 【答案】D 【解析】试题分析:句意:--地球上有生命已经有多少年了?--几百万年了。 Million 百万,七用法是:和数词连用,表示确定的数量,后不加s,也不加of;Millions of固定用法,表示数百万……,必须加s。根据题意,故选D。考点:考查数词的用法
根据文中:Lifeinspaceismuchdifferentfromlifeontheearth.Howdoastronautsliveinspace?(太空中的生命与地球上的生命大不相同。宇航员如何在太空生活)可知,本文主要介绍的是宇航员在太空的生活,所以可能会在科学杂志上看到。故选D(2)细节理解题。根据文中:Manystudentsthinkastronauts'lifeisveryinterestingandtheyalsowant...
So I'm an evolutionary biologist. The thing I love most about evolution is the story. Evolution is a single story that links every species, every branch in the tree of life together. It's this sense of connectivity with the rest of the living world. It's like one of the reasons why...
Have you ever played the game hide and seek?In hide and seek, one person counts up to a number while everyone else hides. But some numbers are so big that you couldn't count up to them in your whole lifetime. How much is a million?
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五、 语法填空(共10分,每小题1分)Life in space is much different from life on earth. How do astronauts live in space?Eating In the past, astronauts could eat only small pieces of dried food. But now astronauts are able to eat more_ (much) everyday food like fruit, vegetables and ice...
3 People have always been c___ about exactly how life on earth began. 4People have always been c___ about exactly how life on earth began. 568. People have always been ___ (好奇) about exactly how life on earth began. 反馈 收藏 ...
3.Tohelp studentsknow the right order of the development of life and the earth; 4.To improvestudents’ reading ability. 05 教学过程 Pre-reading:ask students to read a piece of news and then think about why we s...
Life might have begun in bodies of water on land, perhaps in craters similar to Canada’s Lake Manicouagan, formed by an ancient impact. Credit: Planet Observer/Universal Images Group/GettyOn 18 February next year, a NASA spacecraft will plummet through the Martian atmosphere, fire its retro-...