2022届普通高校招生考试仿真模拟卷XGK(四)4英语试题

2022届普通高校招生考试仿真模拟卷XGK(四)4英语试题，下面是2022届普通高校招生考试仿真模拟卷XGK(四)4英语试题部分示例，验证如下:

Space travelers face a number of health risks. Astronauts have reported loss of bone and muscle ISome have developed immune disorders or heart issues. A new study finds that energy-producing structures in cells might be to blame for many of these problems.
As a systems biologist, Afshin Beheshti studies how multiple parts of the body work together. He is part of a team of researchers who wanted to know how spaceflight might affect cells and tissues. "It's a asic question, "he notes. The team consulted NASA GeneLab. It's a collection of data from past space biology experiments. The scientists studied cells and tissues from mice and people and compared space travelers with others that had remained on Earth?
The idea is not only to look at one type of chemical, " Beheshti says. Rather, they wanted to "look at the living system as a whole". And in doing that, they found a common theme. Mitochondria（线粒体） are the energy powerhouses of cells. And after time in space, mitochondria often didn't work as well as they should. Those findings are consistent with samples from NASA,s Twin Study. Before retiring, astronaut My spent nearly a year aboard the International Space Station. His twin, Mark, remained on the Kel ground. Afterward, blood samples from the two showed different mitochondrial activity

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