行李、包裹灭失、损坏、变坏、污染时要求赔偿是托运人的权利。（）

—Mr. Li ______ to Mary carefully when I entered the classroom this morning.

—He is very patient ______ he is young.

A．talking; but

B．was talking; though

C．talks; though

D．talked; however

石膏

FGD启动时，第一步为启动石灰石制浆系统。（）

电子缴税方式对纳税人类型不做限定，个体户也可以实施电子缴税。