He has poor eyesight _______computer work.

A．because too many

B．because too many

C．because of too much

D．because of much too

下列有关仪器的使用方法或实验操作正确的是( )

A．洗净的锥形瓶和容量瓶可以放进烘箱中烘干

B．酸式滴定管装标准液前，必须先用该溶液润洗

C．酸碱滴定实验中，用待测溶液润洗锥形瓶以减小实验误差

D．用容量瓶配溶液时，若加水超过刻度线，立即用滴定管吸出多余液体。