A:涉及到四种物质
B:原子的种类不变
C:属于复分解反应
D:生成物的质量比为15:1
—Is this your _______ time to visit my mother country, China?
—Yes, so I’m really, really excited.
— There ________ an NBA basketball game in ten minutes.
活鸡和鸡蛋价格持续下跌,养鸡户纷纷压缩养鸡规模。鸡蛋价格不断走高后,养鸡户又作出扩大养鸡规模的决定。这表明( )