PowerPoint的母版包含三个种类，不包含以下选项中的（）形式。 A.幻灯片母版

When an organism is completely encapsulated and preserved, it becomes a fossil, therefore turning into evidence of things that once lived.

A．thereby

B．as a result of

C．so

D．in the end

根据句意和汉语提示，在空格中填入正确的单词。（每空填一词）

小题1:Beijing has already ____________(成功) in hosting the 2008 Olympic Games.

小题2:Air pollution is ____________(有害的) to people’s health.

小题3:The large population also causes many other __________(困难) for the whole nation.

小题4:I can’t go shopping in big stores_________(除非)I travel for a couple of hours.

小题5:He has ___________(大概) gone home.

小题6:____________(欧洲的) countries are beautiful .

小题7:__________(一旦) you’re tired ,you should have a rest immediatetly

溴酸钠（NaBrO3）是某种冷烫精的主要成分，溴酸钠中溴元素的化合价是（   ）

A．－1

B．+1

C．+3

D．+5

有孔虫属于（）。

A.原生动物门

B.软体动物门

C.腔肠动物门

聚合工序调节聚合转化率时，主要调节（）的反应为主。

A.末釜

B.中间釜

C.首釜

D.末釜或中间釜