A:AlCl3溶液中再溶入AlCl3
B:CH3COONa溶液加热
C:氨水中加入少量NH4Cl固体
D:醋酸溶液加热
My parents
My parents work in a show factory. They get up at five thirty. They first get breakfast ready. Then they go to work by bus. They work there from eight to five. They come home at about six and prepare supper for us. Mother washes clothes in the evening. Father often makes toys for us. They are busy all day.
仔细阅读,判断句子正误。
实验假设:酵母菌在有氧条件下呼吸作用比无氧条件下呼吸作用放出热量更多.
下列生活实例与运用的物理知识的说法错误的是( )
下列对合金的说法正确的是( )