待解决 悬赏分:1 - 离问题结束还有 is made up of oxygen,nitrogen and other gases问题补充:匿名 2013-05-23 12:21:38 是由氧气,氮气和其他气体 匿名 2013-05-23 12:23:18 是取得了最多的氧气、氮气和其他气体 匿名 2013-05-23 12:24:58 由氧气、氮气和其他气体制成 匿名 2013-05-23 ...
OWater is made up of oxygen and hydrogen.水由氧和氢构成。Your belt should be made D leather,for it fecls soft and smooth. A.in B.on C.for D. of 相关知识点: 试题来源: 解析 答案见上解析 考查介词。 句意:你的腰带应该是皮革制成的, 因为它摸起来柔软光滑。 be made in意为“在… …...
The sun is mainly made up of ___. A. oxygen and nitrogen B. hydrogen and helium C. carbon dioxide and water vapor D. iron and nickel 相关知识点: 试题来源: 解析 B。太阳主要由氢和氦组成。“oxygen and nitrogen”是氧气和氮气,“hydrogen and helium”是氢和氦,“carbon dioxide and water...
Water is ___ hydrogen and oxygen. A.made upB.made up ofC.made byD.making by 答案 B[解析]be made up of“由……组成,含有”;make up“组成,构成”;be made by“由……制造”。 结果二 题目 Water is ___ hydrogen and oxygen. A.made upB.made up ofC.made byD.making by 答案 B[解析] ...
is made up B. is made up of C. is consisted of D. is consisted in 试题答案 在线课程 B 练习册系列答案 练习册吉林出版集团有限责任公司系列答案 英语同步听力系列答案 初中英语听力系列答案 单元测试卷齐鲁书社系列答案 中考导学案系列答案 中考大提速系列答案 ...
Recall that all living things are made up of tiny units called cells, and that -cells are surrounded by a covering called a membrane (膜).The membrane allows things to move in and out of the cell, and it also controls what can get through. 1 They must have water, oxygen, sugar, sod...
百度试题 结果1 题目Water is oxygen and hydrogen. A. made up of B. made of C. made from D. made in 相关知识点: 试题来源: 解析 A 反馈 收藏
The atmosphere is made up of different gases. Oxygen is one of the important gases for life. What percentage of the atmosphere is made up of oxygen? A. 21%. B. 78%. C. 0.93%. D. 99%. 相关知识点: 试题来源: 解析 A。科普知识中大气的组成,氧气约占 21%。选项 B 是氮气的含量。
But Earth's atmosphere is made up of about 78 percent nitrogen, 21 percent oxygen and trace amounts of other elements, including water vapor. So have you ever wondered if breathing 100 percent oxygen would be good for you? The short answer is it's not. Pure oxygen can actually can be...
Just like cars, trucks, and other vehicles form a transport system for the pick up and delivery of materials out in the world, the body has a transport system, too.3 Passive transport is easiest for the cells because they don't need to use any energy to make it happen.Diffusion (扩散...