Both Ann and her father have a very good heart.
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Ann and her father get along very well and they seldom quarrel with each other.
A. 对
B. 错
Being outspoken is helpful to reduce family conflicts.
A. 对
B. 错
100中不能被2、也不能3、也不能被5整除的数有多少个？
A. 20
B. 24
C. 26
D. 30
设A，B是集合，以下表达式错误的是
A. |A∪B|=|A|+|B|-|A∩B|
B. |~A∩~B|=|E|-|A|-|B|+|A∩B|
C. |A-B|=|A|-|B|
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