5.五师傅$\frac{5}{7}$小时做25个零件,李师傅$\frac{5}{6}$小时做30个零件.他们( )的效率高.
| A. | 王师傅 | B. | 李师傅 | C. | 无法比较 |
4.湖滨新城某初中计划今年的升学人数比去年提高$\frac{1}{10}$,今年的升学人数相当于去年的( )
| A. | $\frac{1}{10}$ | B. | $\frac{9}{10}$ | C. | $\frac{11}{10}$ |
3.下列各组数中,互为倒数的是( )
0 137834 137842 137848 137852 137858 137860 137864 137870 137872 137878 137884 137888 137890 137894 137900 137902 137908 137912 137914 137918 137920 137924 137926 137928 137929 137930 137932 137933 137934 137936 137938 137942 137944 137948 137950 137954 137960 137962 137968 137972 137974 137978 137984 137990 137992 137998 138002 138004 138010 138014 138020 138028 199269
| A. | $\frac{1}{5}$与0.5 | B. | $\frac{1}{7}$和7 | C. | 1 $\frac{4}{5}$和1 $\frac{4}{5}$ |