重庆市位于[ ]
A、岷江与长江汇合处
B、嘉陵江与长江汇合处
C、川黔线与贵昆线汇合处
D、成渝线与宝成线汇合处
答案:B
取0.10ml一氧化碳纯气,用空气稀释至10L,该气体在标准状况下的浓度是()
A.12.5mg/m3
B.10.0mg/m3
C.0.0125mg/m3
D.0.01mg/m3
E.未给出配制时的温度和大气压无法计算标准状况下浓度
---Will you please go to see the movie Guanyinshan with me tonight?
---No, I won’t. I _________it many times.
A.have seen
B.saw
C.will see
D.see