2.下列结论正确的是( )
| A. | 若a>b,则a2>b2 | B. | 若a2>b2,则a>b | C. | 若a>b,则a3>b3 | D. | 若a3>b3,则a2>b2 |
19.下列说法中正确的是( )
0 309839 309847 309853 309857 309863 309865 309869 309875 309877 309883 309889 309893 309895 309899 309905 309907 309913 309917 309919 309923 309925 309929 309931 309933 309934 309935 309937 309938 309939 309941 309943 309947 309949 309953 309955 309959 309965 309967 309973 309977 309979 309983 309989 309995 309997 310003 310007 310009 310015 310019 310025 310033 366461
| A. | $\frac{x+y}{2}$是单项式 | |
| B. | 单项式可以看成是只有一项的多项式 | |
| C. | 单项式3(x2+1)的系数是3 | |
| D. | 多项式$\frac{3x-5}{4}$的常数项$\frac{5}{4}$ |