一I advise you to change your eating habits.You eat too much ice-cream.
A:would
B:wouldn't
C:should
D:shouldn't
我国有“白山黑水”之称的地区是( )
--- Where's your cousin?
--- He his homework in his bedroom.
①将变阻器的滑片置于一适当位置,闭合开关,电动机转动,把重物提起.观察在短时间内重物上升的高度,并分别记下电压表和电流表的读数.
②改变变阻器滑片的位置.在相同的时间内观察重物上升的高度,并在下表中记录了电压表和电流表的读数.
思考问题: