GP
X
R
甲
12.6
2.9
9.7
乙
838.2
166.0
672.2
丙
0.9
0.4
0.5
丁
105.0
38.8
66.2
分解者
184.5
23.8
160.7
请分析表格回答下列问题.
电阻R/Ω
15
25
35
45
55
65
电阻R1/Ω
5
10
20
30
电阻R2/Ω
In our school library there a number of books on science, and in these years the number of them growing larger and larger.
抛物线y=1mx2的焦点坐标为( ) .