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【单选题】
Japan's official position shows that it _________ Washington's plan to develop the NMD project.A.
rejects
B.
is cautious to
C.
concerns
D.
understands
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举一反三
【单选题】( ) of polychlorinated biphenyl onto sea bed sediment and marine plankton was examined.
A.
absorbent
B.
absorption
C.
adsorbent
D.
adsorption
【单选题】Polychlorinated biphenyls (PCBs) are organic compounds that were once used in industrial products such as paints and adhesives. However, open use of PCBs has been banned since 1970s, when it became cl...
A.
Because they contaminate soil.
B.
Because they contribute to global warming.
C.
Because they break down very slowly.
D.
Because they degrade organic matter.
【简答题】多氯联苯(polychlorinated biphenyl,PCB):
【单选题】2006年1月,胡锦涛在全国科学技术大会上阐述了建设创新型国家的指导方针,即( )
A.
自主创新
B.
自主创新、重点跨越
C.
自主创新、重点跨越、支撑发展
D.
自主创新、重点跨越、支撑发展、引领未来
【简答题】BPR的核心内容包括清除非增值活动、 必要活动、任务整合、过程任务自动化。
【单选题】Why does the article refer to polychlorinated biphenyls?
A.
to give an example of a product thought to be harmless that was later found to be toxic
B.
to give an example of a product that has many uses
C.
to explain another new technology
D.
to give an example of a product created with nanomaterials
【简答题】Polychlorinated have already been widely used to manufacture electronic circuit boards. (biphenyl / phenyl)
【单选题】What are the potential risks of nanomaterials?
A.
There are so many products being created that it is hard to track them.
B.
Nanomaterials are so small that they cannot be seen by the human eye.
C.
The small size of nanomaterials may allow them to interfere with biological mechanisms.
D.
Nanomaterials are similar in structure to polychlorinated biphenyls.
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