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That's a significant advancement, the researchers note, since knowing what harmful elements are in the air is critical to finding ways to reduce them, added Gentner. "If you develop anair pollutioncontrol policy based on less specific information for organicaerosol, there may be much more variab...
35 Different ratios of carbon and sulphur are found m organisms depending on whether they come from the ___ 36 Archaeologists analysed modem and ___ food sources for chemical elements. 37 The settlers ate wild creatures as well as ___ Questions 38-39 Choose TWO letters, A-D. An analysi...
sometimes authors are very involved in the process and may even be the screenwriter. This can actually be a disadvantage because they may be too close to the material and find it difficult to adapt to a new form. At other times they are not, and there are instances...
Meanwhile, most young people in the West are expected to leave what could be life's most momentous decision—marriage—almost entirely up to luck. 同时,人们认为西方的大多数年轻人把婚姻这一可能是人生最重要的决定几乎完全交由命运来安排。 柯林斯高阶英语词典 He drinks what is left in his glass ...
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So molecules like this ended up on Earth. In fact, what we call meteorites are pieces broken away from comets and asteroids that came in our atmosphere and left their extra-terrestrial organic matter on the surface of primitive Earth.这样的分子最终来到了地球上。事实上，我们所说的陨石是来自彗星...
Stuart, Alasdair. What Elements Make Up The Air We Breathe? last modified March 24, 2022. https://www.sciencing.com/elements-make-up-air-breathe-8311042/ Recommended When Was The Last Tsunami To Hit California And Could It Happen Again?
are calling 17. are making 18. is driving 19. were talking 20. was running (11)完成时 1. Sofia looked around at all the faces: she had the impression that she ___(see) most of the guests before. 2. While online shopping___(change)our life, not all of its effects have been pos...
are made to avoid the expected potential threats. if we were to keep a record of all the things we worried about during a given period of time, we would discover, in reviewing them, that the great majority of o...