— did you do last weekend?
— I for the English test.
A:What; study
B:What; studied
C:Where; studied
D:How; studied
一只电炉的电阻丝和一台电动机线圈的电阻相等,都是R,设通过的电流强度相同,则在相同的时间内,关于这只电炉和这台电动机的发热情况,下列说法中正确的是( )
小明用刻度尺测物体的长度,如图所示,他所用的刻度尺的分度值是 ____,物体的长度是 ____ cm.