过冷度是理论结晶温度(即熔点Tm)与实际结晶温度之差。()
A、是
B、否
参考答案:A
阅读短文判断对(T)错(F)。
Tom and John are good friends. On Sunday they are in John's room. John's room is very clean (干净的)
and tidy (整洁的). There are two windows in his room. Near the window there is a desk. On the desk there is
an ink bottle (墨水瓶), a lamp and some books. Beside the desk there is a bed. On the wall there is a photo
(照片) of John's family.
( ) 1. Tom and John are friends.
( ) 2. John's room is clean but not tidy.
( ) 3. There are no windows in John's room.
( ) 4. There is a chair and a table in John's room.
( ) 5. A lamp and some books are on the desk.
( ) 6. There is a photo of John's family in the room.
什么是行政法上的行为能力?