图为种子呼吸作用和植物光合作用实验图,请据图回答:
次数
1
2
3
4
5
6
7
h(cm)
0
8
10
12
F(N)
6.75
6.25
5.75
5.25
4.75
4.25
两个电阻R1和R2,其中R1>R2.若将它们串联后接入电压为U的电源两端,则在相等的时间内( )
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