The girl was so ____ by the mighty river that she would spend hours sitting on its bank and gazing at the boats and rafts going and coming.

A．absorbed

B．fascinated

C．moved

D．touched

下列说法正确的是（　　）

A．在稀硫酸中加入铜粉，铜粉不溶解，再加入Cu（NO₃）₂固体，铜粉仍不溶解

B．可用排饱和氯化铵溶液的方法收集氨气

C．碳酸氢铵受热分解产生的气体用碱石灰干燥后可得到纯净的氨气

D．氨气溶于水后，在水溶液中主要以N