0 19827 19835 19841 19845 19851 19853 19857 19863 19865 19871 19877 19881 19883 19887 19893 19895 19901 19905 19907 19911 19913 19917 19919 19921 19922 19923 19925 19926 19927 19929 19931 19935 19937 19941 19943 19947 19953 19955 19961 19965 19967 19971 19977 19983 19985 19991 19995 19997 20003 20007 20013 20021 447348
(1)图中属于烷烃的是
(填字母)