A:溶液的pH变大
B:c(Na+)与c (CO32-)的比值变大
C:溶液浓度变大,有晶体析出
D:溶液浓度不变,有晶体析出
Rose received a letter full of love from her parents on her ______ birthday.
已知△ABC在平面直角坐标系中的位置如图所示.