Look at the candles in the cake, Ann. Can you in one go?
A:blow it out
B:blow out it
C:blow them out
D:blow out them
你想知道别人几岁了,你应该问
下图分别为二氧化碳的制取、检验、收集和性质检验的装置图,其中错误的是( )
已知:线段a,b,c.
求作:△ABC,使得AB=c,AC=b,BC=a.