Plants, however, have a quite low efficiency (效率), usually changing less than one-half percent of solar energy into carbon compounds. Yang’s system is comparable to the plant that best changes CO2 to sugar, which is 4～5% efficient.1. What is the function of the new biological system...
In view of the fact that the air density decreases rapidly with height, about 80 percent of the atmosphere’s mass is concentrated in the troposphere. Above the troposphere there is a transition Figure 1. Vertical distribution of temperature in the atmosphere and terminology associated with it lay...
2.根据第五段 when the scientists pumped about 250 tons of carbon dioxide, mixed with water, about 1,500 feet down into porous basalt.可知答案。3.根据第五段The scientists found that about 95 percent of the carbon dioxide was changed into calcite.和第六段It's beyond all our expectations可知...
17. A lot of people come fromanyplaceofChina or even other contriestalk about a certain topic or any interesting things they like. 今年的倒春寒好像持续的时候很长,而且还有一点小雨,不过登山的人还是有些。 18. come about是什么意思 18. As many of you know, I`ve spent the better part of ...
Naturally occurring radiation could be harmful to microbes near the surface of Mars or to future astronauts. The concerns arise because Mars lacks a protective magnetic field and only has one percent of the atmosphere Earth has. To find high enough radiation levels to calibrate RAD, the ...
record during a period spanning only about 40 million yearsless than about 1 percent of Earth's history. This remarkable flowering of animal diversity appears to have begun about 545 million years ago, which corresponds to the start of the Cambrian period. Hence it is called the Cambrian ...
a subsidiary unit of pressure equal to 1/760 of an atmosphere. More precisely, a torr is equal to 101,325 newtons per m2÷ 760 = 133.322 newtons per m2, or 133.322 pascals. The torr was named in honor of E. Torricelli; the international symbol is Torr. An equivalent unit, the millime...
aand injuries 并且伤害[translate] aprimary job function 正在翻译,请等待...[translate] aNo delivery products 正在翻译,请等待...[translate] aRespiratory infection 呼吸传染[translate] aI spend about 10 percent of my money on clothes. 正在翻译,请等待...[translate]...
Fill in the blank. Normally, about ___ percent of an individual's total energy output goes to the work of breathing. Breathing: Breathing is a physical process in which the air moves into the lungs from the atmosphere in a process called inspiration an...
Mars' atmosphere is over 100 times thinner than Earth's and is primarily composed of carbon dioxide, nitrogen and argon gases.