—I went there by bus.
A:do
B:does
C:did
—I have trouble learning math this term.
—You should pay more _______ to your teacher's advice.
阿林同学对一正常工作电压为2.5V的小灯泡的电阻进行了测量,下表是他测出、算出的相关数据,请你认真分析从中选出正确的选项( )
次数
U/V
I/A
R/Ω
电阻平均值/Ω
1
2.9
0.26
11.2
R
=11.2+7.8+6.33
=8.43
2
2.5
0.32
7.8
3
1.2
0.19
6.3
4
0
下图中,①②③④所示的洋流中,对沿岸气候产生明显增湿作用的是( )