About 78 percent of the atmosphere (大气) is ___. A. oxygen (氧气) B. carbon dioxide
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...
Jet lag. The feeling of being tired and slightly confused of the along planner eesp after traveling between place that have a time difference of the Harvard. Listen to the dialogue and pay attention to the background Information and the opening part of it then complaint. Their job, their co...
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 ...
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...
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 ...
【13】Our school has about 200 computers, but only sixty percent ___(use) regularly.【14】The church ___(date) back to the 18th century is under repair at present.【15】I had just finished the experiment ___ the power cut occurred. 答案 【1】Faced【2】of【3】wher...
Serving hard-to-find Thai dishes in an elegant atmosphere, the restaurant is true to Thai cuisine’s roots, yet still manages to add a special twist. This place is good for a candle-lit dinner or a work meeting with colleagues who appreciate fine food. For those extremely hungry, there’...
Every New Year, thousands decide they’re going to change their lives. Fewer than 10 percent actually stick with their plans, and that figure is being generous.1. Not aiming high enough. While it’s easy to think setting easy goals will keep you motivated, it may harm your long-term mot...
A mountaineering friend once told me that atop Mount Qomolangma, which stands at 8,848.86 meters, the amount of oxygen in the air is about one-third of that at sea level. In Lhasa, at an altitude of more than 3,600 meters, the oxygen content is about 65 percent of that at sea ...