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更多“KAI含氯消毒粉（绿）配比标准：___包绿粉+___、___…”相关的问题
第7题
含0.010gFe3+的强酸溶液，用乙醚萃取时，已知其分配比99，则等体积萃取一次后，水相中残存的Fe3+量为（)。
A.0.10mg
B.0.010mg
C.1.0mg
D.1.01mg
第9题
Li Qiang has been in Beijing for a few days. He wants to visit the China Railway Museu
m. He asks his friend Ma Kai for help. Li Qiang: Hi, Ma Kai. Do you know the China Railway Museum？ I heard that many people all over the world visit it every day. Ma Kai: Yeah. It is the () professional museum about the railway system in China. Li Qiang: Oh, really？ It must be () . Ma Kai: Yes, you.ll be able to see a large number of () objects, () ,photos, () and multi-media, etc. All these will give you a detailed () to the development of the Chinese railway system in the past century. Li Qiang: Where is the Museum () ？ Ma Kai: It is located in Chaoyang District, about 15 kilometers () of downtown Beijing. Li Qiang: Is it () for you to take my brother and me there？ I.d like someone () with the museum to go with us. Ma Kai: Sure, I.d be very glad to be your tour guide.
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