练习:
1.that was scientists understanding of methane?
A)It was produced from plants.
B)It was not a greenhouse gas.
C)It was produced in oxygen-free environments.
D)It traps more heat than any other greenhouse gas.
2.To test whether plants are a source of methanethe scientists created
A)a oxygen-free environment.
B)an environment with the same concentration of oxygen as the Earth has.
C)a carbon dioxide-free environment.
D)an environment filled with the greenhouse gas
3.hich statement is true of the methane emissions of plants in the experiment?
A)The lower the temperaturethe higher the amount of methane emissions.
B)Living plants release less methane than dried plants at the same temperature.
C)When exposed to sunlightplants stop releasing methane.
D)The higher the temperaturethe greater the amount of methane emissions.
4.What of the following about methane is Not mentioned in the passage ?
A)Plants growing in soil release methane.
B)Plants growing in water release methane.
C)Soil microbes consume methane.
D)Microbes in plants produce methane.
5.What is the beneficial point of some microbes consuming plant-produced methane?
A)Methane becomes less poisonous.
B)methane is turned into a fertilizer.
C)Less methane reaches the atmosphere.
D)Air becomes cleaner
我的一次探险经历
智能手机让人每天加班两小时
人生的转折
我心中的理想
我从生活中学到了语文
人生一世,孰能无败
人生的作文
生活处处有语文给我的启示
龙宫探秘
我的理想
探险心得
我的自画像
撒野亚马逊
这就是我
圣灯山探险游
探险记
我从影视中学到了语文
我从聊天中学到了语文
万泉河探险记
生活处处有语文给我的启示
丑闻、头条人物成2017万圣节热销面具
人生如灯冷静
让“星光”点亮人生
英国人爱上蘑菇 一年吃掉12万吨
英中学瞒家长给女生打针避孕
梦中探险
我从电脑游戏中学到了语文
我从影视中学到了语文
有其父必有其子?迈克尔·杰克逊子女生活奢侈随父亲
研究称大象有4种性格 助其野外生存
不限 |
英语教案 |
英语课件 |
英语试题 |
不限 |
不限 |
上册 |
下册 |
不限 |