1 23 1,,,2,

:1..,,.2.,.::2.,.

1.2.:.

1 A B C D D

2 A B C DD

3 A B C DD

123

99 12

C10-7C

99 12: 3

ee=1.610-19Ce

.+ + ++ +ABAB

100 123

. .:.:...:.:.....

Cee=1.610-19C

1 ABABACA______BC_______ ()2 ( )A B C D C

3 [ ]A B C D 4 [ ]A B C D DC

5 [ ]A B CD

6 [ ]A B C D BC

9 [ ]A B C D 10 [ ]A B C D CD

11 [ ]AB C D

D