I got on the bus and found a seat near the back, and then I noticed a man ____ (sit) at the front.
80÷4=____ 60÷3=____ 74-8=____ 33×2=____ 76-50=____
上英语口语课时,我发现老师把一个单词读错了,我应该:( )
关于电源的电动势,下列说法正确的是( )