下列实验所用的试纸不能预先用蒸馏水润湿的是( )
A:用品红试剂检验SO2
B:用淀粉碘化钾试纸检验Cl2
C:用红色石蕊试纸检验NH3
D:用pH试纸测定某溶液的pH
My parents are not at home this evening,but I'm not .
⑴Can I wear my jacket? ____ A.Yes, it is.
⑵Is it hot in Harbin? ____ B. It's windy today.
⑶What's the weather like today? ____ C. No, you can't.