2.下面数据中,是准确数的是( )
| A. | 珠穆朗玛峰高出海平面8844米 | |
| B. | 人的大脑有10000000000个细胞 | |
| C. | 小明买了5本小说 | |
| D. | 有关部门预测到2020年轿车的拥有率将达到30% |
18.在△ABC中,若sinB=$\frac{\sqrt{3}}{2}$,cosA=$\frac{1}{2}$,则△ABC是( )
0 309809 309817 309823 309827 309833 309835 309839 309845 309847 309853 309859 309863 309865 309869 309875 309877 309883 309887 309889 309893 309895 309899 309901 309903 309904 309905 309907 309908 309909 309911 309913 309917 309919 309923 309925 309929 309935 309937 309943 309947 309949 309953 309959 309965 309967 309973 309977 309979 309985 309989 309995 310003 366461
| A. | 等腰三角形 | B. | 等边三角形 | C. | 直角三角形 | D. | 等腰直角三角形 |