A:of taking
B:taking
C:to take
D:take
“离离原上草,一岁一枯荣,野火烧不尽,春风吹又生。”这告诉我们( )
计算 16 +14时,需要将它们通分成同分母分数,分母是____,通分后分数单位是____,结果是____。
in on about with of