A:电源的电动势反映了电源将电能转化为其它形式的能的本领
B:电源提供的电能越多,电源的电动势就越大
C:电源的电动势越大,也就是电源内储存的电能越多
D:单位时间内电源消耗的其他形式的能的数值等于电源电动势的值
Hi,I'm Lili. I'm from China. I'm a____(student\teacher).This is my family. Look at the man,____(He's\She's)my father. Look at the woman,____(He's\She's)my mother.____(He's\She's)a____(student\teacher). I love my family.
关于发展中国家和发达国家的叙述,正确的是( )