问题
单项选择题 A1型题
危重哮喘患者肺部哮鸣音减弱或消失的原因是（）
A.合并气胸
B.合并严重肺部感染
C.支气管高度狭窄或痰栓阻塞
D.支气管痉挛缓解
E.支气管内痰液被清除
答案
参考答案：C
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危重哮喘患者肺部哮鸣音减弱或消失的原因是（）
A.合并气胸
B.合并严重肺部感染
C.支气管高度狭窄或痰栓阻塞
D.支气管痉挛缓解
E.支气管内痰液被清除
参考答案：C
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| New Energy in the Twenty-first Century Energy from the wind Wind is a kind of clean energy, and there is lots of it, but, if there's no wind, there is no wind energy. Energy from the water When water moves from a high place to a lower place, it can make electricity (电) without pollution. However, people have to build dams (水坝) to use this energy, and building dams is very expensive. Energy from the earth There is heat in the rocks under the earth. Scientists use the heat to make geothermal (地热的) energy. This kind of energy is cheap, but it is only possible in a few places in the world. Energy from the sun Solar panels (太阳电池板) on the roofs of houses can turn energy from the sun into electricity. Solar power is clean and plentiful (丰富的), but when the weather is bad. It doesn't work. | |||||||||||||||
New Energy in Twenty-first Century
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