A.CAE B.CAM C.CAT D.CAD
A.4s B.60s C.15s D.40s
A.順序結(jié)構(gòu) B.樹型結(jié)構(gòu) C.分支結(jié)構(gòu) D.循環(huán)結(jié)構(gòu)