1022
-():()()()()()()-()1.2.()3.()4.()
1.()2. 3.()1.( )2. 3.()4. 5.()()()()1. 2.3.()1.
2.3.406450101415925252580303030()1524 1. 2. 3. 4. 5.
1.2 2. a.(1224) * b.20 (101~120) c. 10
2044222220022020X102312121()2()1()1.
2.
3. 10
101010X10111X11
()()()()17-8(20)
(108109141142143)
