请你将下面左边的实例与右边的紫外线特性用线连起来。 实例 紫外线特性 A.医

题型:操作题

问题:

请你将下面左边的实例与右边的紫外线特性用线连起来。

                     实例                            紫外线特性  

A.医院用紫外线消毒        a.使荧光物质发光  

B.人应适量的晒一晒        b.能杀死微生物太阳  

C.夏天用遮阳伞                c.有助于合成维生素D  

D.用紫外线验钞                d.避免使皮肤发生病变

考点:紫外线
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词汇运用 用括号内所给词的适当形式填空(每空不限一词)。

小题1:Computer is one of the greatest ______ (invent). I can’t imagine life without it.

小题2:What do you go to the library for?       (search) for some information about my project.

小题3:He looked ___________(angry) at me just now.

小题4:The ______(lose) of my lovely dog made me very sad.

小题5:It is _________(frost) in Jiangsu today than yesterday .

小题6:It ___________ (not allow) to add unhealthy food additives(食品添加剂) in any food in China now.

小题7:July 1st this year is the ____________ (ninety) birthday of the CPC(中 * * 党). There    would be no new China without our great Party.

小题8:I was glad to chat with my friend Mary on QQ yesterday. We_____(not chat) with each other on QQ for a long time.

小题9:My album is different from all my           (friend).

小题10:I found my father still ___________ (wake) when I entered his room at 11 last night.

题型:操作题

大气环流、洋流调节了高、低纬之间的的热量差异,并使同纬度大陆东西两岸()出现差异。

题型:操作题

电机直接起动时,其起动电流通常为额定电流的()。

A.2~4倍

B.4~6倍

C.6~8倍

题型:操作题

2CZ系列二极管主要用于()线路中。

A.检波

B.开关

C.整流

D.稳压

题型:操作题

假设你的项目采用挣值管理。项目具有极长的工作包。因此,用来计算挣值的方法是()。

A.0/100准则

B.里程碑法

C.等效

D.分摊型投入

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