A.素數(shù)是大于1的自然數(shù) B.素數(shù)是只能被1整除的數(shù) C.3是素數(shù) D.1是素數(shù)
A.反射 B.平移 C.旋轉(zhuǎn) D.折射
A.12 B.13 C.14 D.15