---Lucy likes sports very much.

---Yes, she is good ________ playing badminton.

A．at

B．for

C．in

D．To

有10g Na₂O₂、Na₂O、Na₂CO₃、NaOH的混合物与100g质量分数为3.65%的盐酸恰好反应，蒸干溶液，最终得固体质量为

A．11.7g

B．5.85g

C．8g

D．15.5g