下列物质中，不属于电解质的是
A．H2SO4
B．NaOH
C．NaCl
D．C2H5OH
答案：D
C2H5OH为有机化合物，属于非电解质。
用所给单词的适当形式填空。
1. Monday isn't (one) day of a week.
2. What _____ (lesson) do you have on Wednesday?
3. We say hello from Sunday _ (to) Saturday.
4. Can you show _____ (we) how (make)a tiger mask?
5. English is very (interest).
双指示剂是指甲基橙和（）的指示剂。
A.铬黑T
B.酚酞
C.淀粉
D.甲基红
