单项选择题
A.18~20cmB.19~22cmC.19~21cmD.18~21cm
A.1,0.8~1B.1.5,0.8~1.5C.2,0.8~1D.3,0.8~1.5
A.红和橙黄B.深绿和浅绿C.黄和紫D.红和绿