A:e−2,1
B:1,e
C:0,1
D:e−2,e
1 morning, everyone. 2 Grace. Look (看).This is a 3 .It’s a nice quilt. What 4 is it? 5 yellow and white. And 6 this in English?It’s 7 .It’s 8 jacket. That’s a ruler. 9 ruler is 10 .
小满的叔叔从日本带回了一个标有“110V,40W”的白炽灯,他想在家里使用,于是给它串联了一个电阻,使它正常发光.同时小满观察了自己家里标有“220V 40W”的灯泡正常发光的情况,发现( )
“五•一”节小王同学在父亲带领下到江阴黄山湖公园划船游玩.已知船和人总重6000N,划船用的桨是____ 杠杆(选填“省力”或“费力”).当船在水中加速行驶时,船受到____ 作用(选填“平衡力”或“非平衡力”).