1.从-1,0,π,3中随机任取一数,取到无理数的概率是( )
0 283779 283787 283793 283797 283803 283805 283809 283815 283817 283823 283829 283833 283835 283839 283845 283847 283853 283857 283859 283863 283865 283869 283871 283873 283874 283875 283877 283878 283879 283881 283883 283887 283889 283893 283895 283899 283905 283907 283913 283917 283919 283923 283929 283935 283937 283943 283947 283949 283955 283959 283965 283973 366461
| A. | $\frac{1}{10}$ | B. | $\frac{1}{5}$ | C. | $\frac{1}{4}$ | D. | $\frac{1}{2}$ |