夏天,从冰箱中取出瓶装矿泉水时,会发现瓶外壁“出汗”,这是( )
A:水从瓶内渗出来的结果
B:空气中水蒸气遇冷的液化现象
C:空气中水蒸气的汽化现象
D:瓶外壁上的水汽化产生的现象
____ ____ ____ three classes this morning?
下列有关我国民族的说法,错误的是( )
Mothers holding jobs outside the home should have ________ schedules to make it easier to care for their children. ( )
孩的笔画顺序是:____