根据第一段“The atmosphere (大气层) on Mars is mostly made of carbon dioxide (二氧化碳).”可知,火星上的空气主要由二氧化碳组成。故选B。 (2)题详解: 推理判断题。根据第二段“NASA says that getting 4 astronauts home from Mars would take about 25 tonnes of oxygen.”可知,让四名宇航员从火星...
In the 1920s, Aleksandr Oparin, a Russian biochemist, proposed and developed the idea that life originated in the warm, watery environment of early Earth's surface, under an atmosphere mostly composed of methane. The early seas were believed by Oparin to be rich in simple organic molecules,...
百度试题 结果1 题目3. The atmosphere of Mars is(be ) made up mostly of carbon dioxide. 相关知识点: 试题来源: 解析 答案见上 反馈 收藏
百度试题 结果1 题目TheatmosphereOfM_2rs(be) made up mostly of carbondioxide. 相关知识点: 试题来源: 解析 3.is 反馈 收藏
The atmosphere in the crowded hall became so stifling that two of the old ladiesA.passed o The atmosphere in the crowded hall became so stifling that two of the old ladies A.passed off B.passed up C.passed through D.passed out 点击查看答案 第8题 (The atmosphere) (is consisted) of ...
sometimes gathering and other times dispersing, creating a scene resembling a fairyland. Walking through the canyon, the gentle flow of streams underfoot and the crisp chirping of birds in the air create a peaceful atmosphere. The air is filled with the fresh scent of earth and vegetation, refre...
In such an atmosphere it is indeed hard to make the molecular bricks of life, let alone a living organism. It is hard even to make the chemical compounds necessary for life. The most important compounds are formaldehyde and hydrogen cyanide, which, brought together in the presence of water,...
II. Atmosphere: Atmosphere is the mass of air that extends outward from the surface of the Earth into space. The entire atmosphere is mixture of gases and weighs 5,700 trillion tonnes. A column of air weighing about one tonne is pressing downwards on our shoulders, but we do not feel ...
A. Whether it was originally part of a larger meteoroid B. Whether it originated in the inner or outer solar system C. What proportion of iron and stone it contains D. How large it is when it enters the Earth's atmosphere 你的答案: 正确答案:D 题目解析: 登录 后才能查看题目解析,...
Earth is surrounded by a blanket of air, which we call the atmosphere.The atmosphere is the mixture of gases and other materials that surround the Earth in a thin, mostly transparent(透明的)shell.It is held in place by the Earth's gravity.It reaches over 560 kilometers(348 miles)from th...