A:H+H→H2
B:H+Cl→HCl
C:I2→I+I
D:S+O2→SO2
下列粒子不能直接构成物质的是
“种瓜得瓜,种豆得豆”这句俗语说明自然界中普遍存在着
Shall we________our discussion and have some tea?