参照图示中一些常见物质的pH进行判断,下列说法正确的是( )
A:厨房清洁剂比厕所清洁剂碱性强
B:肥皂水能使紫色石蕊溶液变红
C:白醋能使无色酚酞溶液变红
D:西瓜汁的酸性比橘子汁的酸性强
学习隋唐史后,四位同学作了主题演讲,你认为能准确地概括这段历史基本特征的是( )
- ____ you ____ (write) to the newspaper to talk about the terrible traffic in our city?
- Not yet.