-------He says that my new car is a ____________ of money. 

-------Don’t you think those words are just sour grapes?

A．lack

B．load

C．question

D．waste

季节性运行的锅炉房适合建造于( )。

A．全年最小频率风向的上风侧

B．全年最小频率风向的下风侧

C．该季节主导风向的下风侧

D．该季节盛行风向的上风侧