【单选题】对于大多数纯液体而言,一定压力下表面张力随温度的变化率( )
【单选题】整个招标过程的结果性阶段是(),包括:开标、评标、定标、签约等工作。
【单选题】Radio is used a lot because__________ _.A.it costs less than TVB.it costs more than
A.
30. Radio is used a lot because__________ _. A.it costs less than TV
C.
it is not so cheap as TV
D.
people can't know the news on TV