0 40842 40850 40856 40860 40866 40868 40872 40878 40880 40886 40892 40896 40898 40902 40908 40910 40916 40920 40922 40926 40928 40932 40934 40936 40937 40938 40940 40941 40942 40944 40946 40950 40952 40956 40958 40962 40968 40970 40976 40980 40982 40986 40992 40998 41000 41006 41010 41012 41018 41022 41028 41036 199269
如图 中，∠1是30°，那么∠2是（ ）°．