—
—That's a good idea.
A:Does he watch TV?
B:Let's g o to the zoo.
C:Where is my dog?
D:Who are you?
①锌为正极,石墨为负极②锌为负极,石墨为正极③工作时,电子由石墨极经过外电路流向锌极④长时间连续使用时,内装糊状物可能流出腐蚀用电器.
古人云:流水之声可以养耳,青禾至绿可以养目,观书绎理可以养心,弹琴学字可以养脑,逍遥杖履可以养足,静坐调息可以养骸。这说明 ( )
The heavy snow ____ them ____ ____ out.