There is oxygen in the atmosphere of the earth.D. The earth seems to be just the right distanceaway from the sun.2. The underlined phrase “the third planet" in the firstparagraph refers to theA.sunB. moonC.earthD.Mars3. Which of the following about Mars is NOT true?A. There could...
5.21% of the atmosphere is oxygen百分之二十一的大气是氧气。 相关知识点: 试题来源: 解析 答案见上 结果一 题目 5. 21% of the atmosphere百分之二十一的大气是氧气。 答案 uosx*os1⋯ 相关推荐 15. 21% of the atmosphere百分之二十一的大气是氧气。
Most of the oxygen in the oceans and phytoplankton production is the 60% of oxygen in the atmosphere. Baleen whales are able to eliminate rival-phytoplankton-zooplankton. In addition, toothed whale also helps to maintain the ecological balance of fish. Toothed whale food is fish eat large mollus...
1.Which of the following is NOT the reason that the earth has life? A. The earth is just the right temperature. B. There is oxygen in the atmosphere of the earth. C. The volcanoes on the earth are lower than those on Mars.
Oxygen is indispensable to us. If the oxygen in the atmosphere rarefied, and can't let humans normally breathe, I am afraid that people will not be able to have a trip. Although you can use high technology can replace 翻译结果4复制译文编辑译文朗读译文返回顶部 I am of the view that ...
A. oxygen (氧气) B. carbon dioxide (二氧化碳) C. nitrogen (氮气) D. hydrogen (氢气) 相关知识点: 试题来源: 解析 C 正确答案:C 解析:大气的主要成分是氮气(nitrogen)哦,大概占大气总成分的78%左右, 而氧气(oxygen)只占20%左右,剩余的2%由二氧化碳(carbon dioxide)等其他气体组成。反馈...
1Scientists believe that there is not enough oxygen in the Moon’s atmosphere to()plant life. A. adapt B. personalize C. sustain D. describe 2【题目】17. Scientist beieve thatthereis notenough oxygen inthe Moon's atmosphereto plantlife. A. adaptB. personalizeC. sustainD. describe 反馈...
Scientists believe that there is not enough oxygen in the Moon’s atmosphere to sustain plant life.选择语言:从 到 翻译结果1翻译结果2 翻译结果3翻译结果4翻译结果5 翻译结果1复制译文编辑译文朗读译文返回顶部 科学家认为,没有足够的氧气在月亮上的气氛,以维持植物的生命。 翻译结果2复制译文编辑译文朗读...
This gave the earth its oceans. Water made 66. possible for plants to grow. Then the plants created oxygen in the atmosphere,67. the gas -that humans and animals breathe. Mars is the only planet in the solar system that seems to be anything like the earth. It is 68. (small) than ...
oxygen that fish and other aquatic organisms need to stay alive.So, since there's no single place you can treat the runoff before it reaches the bay, any efforts to reduce this non-point source pollution generally need to be aimed at keeping pollution out of the streams in the first place...