A:AB段发生反应的离子方程式为:Ba2++SO42﹣═BaSO4↓
B:E点对应横坐标稀硫酸的体积为70mL
C:D点表示的沉淀的化学式为Al(OH)3、BaSO4
D:E点沉淀比A点沉淀质量大2.33g
There are two birthdays in August. (改为一般疑问句)
____ two birthdays in August?