—I'm 1.42 metres.
—Oh! ________ I'm 1.38 metres.
A:I'm taller than you.
B:You're taller than me.
C:I'm stronger than you.
Peter was so excited _______ he received the invitation to the important meeting.
实验序号
稀硝酸的体积/mL
剩余固体的质量/g
NO的体积/L
1
100
17.2
2.24
2
200
8.00
4.48
3
400
0
V
下列说法正确的是( )
在如图甲所示的电路中,电源电压保持6V 不变,R1的阻值为10Ω.闭合开关S,电压表的示数如图乙所示.
(1)求通过电阻R1的电流;
(2)求电阻R2的阻值.