问题
问答题 简答题
发动机的危害因素主要有哪些？
答案
参考答案：发动机的危害因素主要有高温、机械旋转、噪声、废气危害等。
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发动机的危害因素主要有哪些？
参考答案：发动机的危害因素主要有高温、机械旋转、噪声、废气危害等。
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| This is Alice White. She is from Canada. She is twelve years old. She studies in Fuzhou No.4 Junior High School. She is in Class Eight, Grade Seven. Alice looks very cute. She has big eyes and long red hair. She has two brothers. She and her brothers are in the same school but in different grades. Alice's favorite food is chicken. She has a pet dog. She likes dogs very much. | ||||||||
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