A:专家推荐
B:统计评价
C:个人推荐
D:核心刊物评价
对于闭合电路欧姆定律的理解,下列说法一定正确的是( )
There are many kinds of pollution on Earth, ____ ____, noise is a kind of pollution.
—Sorry, Sir. I can't remember all the new words we learn every day.
—________. Practice more.
1996年,我国北方地区苹果价格大跌,并且出现滞销局面,造成这种现象的主要影响因素是( )
1月份,黑龙江省冰天雪天时,海南岛依然百花盛开,这是因为( )