4.已知点P与点Q(0,2)关于坐标原点O成中心对称,那么点P的坐标是( )
| A. | (0,-2) | B. | (0,2) | C. | (2,0) | D. | (-2,0) |
3.某商品的价格标签已丢失,售货员只知道它的进价为80元,打七折售出后,仍可获利5%,你认为标签上的价格为( )元.
| A. | 110 | B. | 120 | C. | 130 | D. | 140 |
19.时钟指向8点30分时,时钟指针与分针所夹的锐角是( )
0 291935 291943 291949 291953 291959 291961 291965 291971 291973 291979 291985 291989 291991 291995 292001 292003 292009 292013 292015 292019 292021 292025 292027 292029 292030 292031 292033 292034 292035 292037 292039 292043 292045 292049 292051 292055 292061 292063 292069 292073 292075 292079 292085 292091 292093 292099 292103 292105 292111 292115 292121 292129 366461
| A. | 70° | B. | 75° | C. | 60° | D. | 80° |