A:CaO
B:CaCO3
C:Ca(OH)2
D:Na2CO3
在清水中放入一小勺糖后,不搅动水也会变甜.这一现象说明 ( )
On their wedding, up________into the air. Then the relatives and friends cheered up.
下列各数为不等式组 2x-3>0x-4<0整数解的是( )