问题
单项选择题
最具推广价值的灭火剂是()灭火剂。
A．七氟丙烷
B．1211
C．1301
D．二氧化碳
答案
参考答案：A
解析：综合各种替代物的环保性能及经济分析，七氟丙烷灭火剂最具推广价值。
搜题请搜索小程序“爱下问搜题”
最具推广价值的灭火剂是()灭火剂。
A．七氟丙烷
B．1211
C．1301
D．二氧化碳
参考答案：A
解析：综合各种替代物的环保性能及经济分析，七氟丙烷灭火剂最具推广价值。
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| When I first ate in a western restaurant, I didn't know what I was supposed to do. Everything was l . I was used to _ 2 with chopsticks and a spoon, but I had to eat with a knife, a fork and a spoon. And I had, not just one set to 3 , but two or three of each. Questions 4 my mind. Was I supposed to begin with the largest or the smallest? Was I supposed to start at the outside and work in or the inside and work out? Was I supposed to hold the spoon in my left hand or my right hand? What I finally decide to do was just to 5 the others. | ||||
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