矩形属于平行四边形,所以矩形具有平行四边形的一切性质。[ ]
正确
阅读短文,判断正(T)误(F)。
Hello! I'm Danny. Welcome to Canada. Today is December 25th. It's Christmas. At Christmas, department
stores usually have Santas. Santas are fun. Every child wants gifts at Christmas. They don't go to school on
Christmas Day. Their parents don't go to work, either. People have a Christmas holiday. They are all very happy.
( ) 1. Every child wants gifts at Christmas.
( ) 2. At Christmas, one department store usually has one Santa.
( ) 3. Christmas Day is in November in Canada.
( ) 4. People have a Christmas holiday in Canada.
( ) 5. Children usually go to school on Christmas Day.
10KV母线投入运行前的绝缘电阻不得低于()MΩ。
A.5
B.7
C.1
D.10