A.兩點(diǎn)(2P) B.三點(diǎn)(3P) C.四點(diǎn)(4P) D.切點(diǎn)、切點(diǎn)、半徑
A.15° B.30° C.45° D.60°
A.Zoom命令W選項(xiàng) B.Zoom命令E選項(xiàng) C.Zoom命令A(yù)選項(xiàng) D.雙擊鼠標(biāo)滾輪