A:导体两端的电压跟导体中的电流成正比
B:导体的电阻跟通过导体的电流成反比
C:当通过导体中的电流为0A,导体的电阻也为OΩ
D:当导体两端电压一定时,导体中的电流跟导体的电阻成反比
选择正确的读音
过燕山 (yàn yān) ____ 小燕子 (yàn yān)____
将士( jiānɡ jiànɡ) ____ 将军 (jiānɡ jiànɡ)____
下列说法正确的是( )
选择合适的句子,补全对话。(有两项是多余的)
A. What did you do yesterday?
B. Where did you go yesterday?
C. How many children were there at the party?
D. Yes, he did.
E. Why did you visit Mike?
F. No, they weren't.
G. How many children are there at the party?
A:Hello, Liu Yun. ____
B:I visited Mike.
A:____
B:Because it was his birthday yesterday.
A:Did he have a birthday party?
B:____
B:There were fifteen children at the party.
A:Were Mike's parents at home?
一次函数y1=k1x+b1与y2=k2x+b2的图像如图所示,则下列结论中正确的个数为( ) (1)、b2>0, (2) k1<k2 ; (3) 当x<5时,y1>y2。