17.能围成三角形的组线段( )
| A. | 5cm、3cm和3cm | B. | 6cm、8cm和2cm | C. | 2cm、3cm和6cm |
15.小明家离学校1200米,他步行的速度是每分钟40米,他走路去学校要花( )分钟?
0 126942 126950 126956 126960 126966 126968 126972 126978 126980 126986 126992 126996 126998 127002 127008 127010 127016 127020 127022 127026 127028 127032 127034 127036 127037 127038 127040 127041 127042 127044 127046 127050 127052 127056 127058 127062 127068 127070 127076 127080 127082 127086 127092 127098 127100 127106 127110 127112 127118 127122 127128 127136 199269
| A. | 20 | B. | 30 | C. | 40 |