在元素周期表中，同周期元素从左到右金属性逐渐减弱，非金属性逐渐增强。( )
参考答案：对
— Mr. Smith was really helpful when you were in financial difficulty during those years.
— Definitely. I can never appreciate his kindness ________.
A．seriously
B．well
C．enough
D．properly
黄芩清肺汤功效与作用
