,
(
150
300
450
600
750
900
1050
1200
1350
1500
)
1
...
52
53
54
55
56
57
58
59
60
61
62
63
64
...
513
. . n - -
-
,
15-207-78
-
(Types of Questions)
,
1 . ( 1)
1
CaCl2, PCl3, H2
. (4, 5 6 )
: 148 01 04
( )
1
...
52
53
54
55
56
57
58
59
60
61
62
63
64
...
513