圆上各点到圆心的距离都等于____ ,到圆心距离等于半径的点都在____ .
⑴Let's go to the library.____ A.
⑵School is over.It's time to go home.____ B.
⑶It's hot.I can swim.____ C.
⑷Today is snowy and cold.____ D.
⑸We have art class at 3 o'clock.____ E.
41-4=____
51-14=____
91-4=____
91-24=____
26-9=____
36-9=____
36-19=____
66-9=____
66-39=____
物态变化在日常生活中处处可见,下列物态变化属于升华的是( )