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对群体创伤紧急处理后，应迅速做出伤情初步评估，千万不可忽略
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一额定电压为10KV的静电电容器，其容抗值为10.5Ω，接在6KV母线上，电容器在额定电压下供给母线的无功功率为（）
Healthy trees are important to us all. Trees provide shade, beauty, and homes for wildlife. Trees give us products like paper and wood. Trees can give us all these only if they are healthy. They mustbe well cared for to remain healthy.Your trees’ trouble may be you yourself. People spend much time and money to plant and maintain trees. Trees improve the looks of homes, parks, business, and public buildings. Yet, people who love trees the most may be the ones who cause them injury. Of course, they do not do this on purpose. They are most likely not aware of the kinds of things that injure trees. There are many people-caused tree injuries. You should become aware of them and avoid them. Learn the things that can help to keep your trees healthy.Healthy trees are beautiful. They make our world a pleasant place to live. Unhealthy trees are not as beautiful. They make our world less pleasant. Healthy trees help to cool and clean the air. They can even deaden(闷抑) sound. Unhealthy trees cannot help or protect the environment. Trees, like people, are disturbed by changes around them. Construction of building is a major cause of tree injury. According to the passage, only（）trees can give us shade and products.
Healthy trees are important to us all. Trees provide shade, beauty, and homes for wildlife. Trees give us products like paper and wood. Trees can give us all these only if they are healthy. They mustbe well cared for to remain healthy.Your trees’ trouble may be you yourself. People spend much time and money to plant and maintain trees. Trees improve the looks of homes, parks, business, and public buildings. Yet, people who love trees the most may be the ones who cause them injury. Of course, they do not do this on purpose. They are most likely not aware of the kinds of things that injure trees. There are many people-caused tree injuries. You should become aware of them and avoid them. Learn the things that can help to keep your trees healthy.Healthy trees are beautiful. They make our world a pleasant place to live. Unhealthy trees are not as beautiful. They make our world less pleasant. Healthy trees help to cool and clean the air. They can even deaden(闷抑) sound. Unhealthy trees cannot help or protect the environment. Trees, like people, are disturbed by changes around them. Construction of building is a major cause of tree injury. The purpose of the passage is to tell（）
对电力系统的基本要求是（）
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