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
物质
a
b
c
d
反应前质量(g)
18
1
2
32
反应后质量(g)
待测
26
12
已知线段a=2厘米,c=8厘米,则线段a和c的比例中项b是____厘米.
big (反义词) ____
﹣ Mom, ______ I visit the art museum next Monday?
﹣ I'm afraid you can't. All museums in the city are closed on Monday.