难挥发性二硫化钽(TaS2)可采用如图所示的装置提纯。将不纯的TaS2粉末装入石英管一端,抽成真空后引入适量的碘并封管,置于加热炉中。反应如下:TaS2 (s)+2I2 (g) TaI4 (g)+S2 (g) 下列说法正确的是( )
He was taking photos in the park at this time yesterday.( )
A.主语B.表语C.宾语D.宾补
Bad luck!The film star had her leg while playing a part in a film.( )
to break
breaking
break
broken
They were plying soccer on the playground the storm came.( )
as soon as
as long as
when
while
I can't find my wallet anywhere.I'm sure I it.( )
lost
will lose
lose
have lost
He felt surprised that he couldn't say a word with is mouth wide open.( )
very
such
so
too