A.They have been using it for billions of years.
B.They are the real experts in producing it.
C.They have been a source of it.
D.They have been used to produce it.
A.Right
B.Wrong
C.Not mentioned
开始考试点击查看答案A.Right
B.Wrong
C.Not mentioned
开始考试点击查看答案A.Right
B.Wrong
C.Not mentioned
开始考试点击查看答案A.Right
B.Wrong
C.Not mentioned
开始考试点击查看答案A.Right
B.Wrong
C.Not mentioned
开始考试点击查看答案A.improve the efficiency of it.
B.turn plant sugars to a new form of energy.
C.get more sugars and starches from plants.
D.make green plants a new source of energy.
开始考试点击查看答案A.they are grown in narrow-necked bottles.
B.there is no oxygen in the air.
C.there is enough oxygen in the air.
D.enough starches is stored.
开始考试点击查看答案A.it is hard to create an airfree environment.
B.it is expensive to remove the sulfate from the environment.
C.removing the sulfate slows down hydrogen production.
D.the algae’s cells work slowly if there is no oxygen in the air.
开始考试点击查看答案A.They can be a good energy source.
B.They grow faster in a reactor.
C.They will be planted everywhere.
D.They are cheap to eat.
开始考试点击查看答案A.Public lands play an important role in energy production.
B.Public lands are one of the main sources of revenues.
C.Public lands should be developed to ease energy shortage.
D.Public lands store huge energy resources for further development.
开始考试点击查看答案注册安全工程师注册安全工程师安全生产技术2013年安全工程师
类别:建筑类其它注册安全工程师注册安全工程师安全生产技术2013年安全工程师
类别:建筑类其它注册安全工程师注册安全工程师安全生产技术2013年安全工程师
类别:建筑类其它注册安全工程师注册安全工程师安全生产技术2012年注册安全工
类别:建筑类其它注册安全工程师注册安全工程师安全生产技术2011年安全工程师
类别:建筑类其它注册安全工程师注册安全工程师安全生产技术2010年注册安全工
类别:建筑类其它注册安全工程师注册安全工程师安全生产技术2009年注册安全工
类别:建筑类其它注册安全工程师注册安全工程师安全生产技术2009年安全工程师
类别:建筑类其它注册安全工程师注册安全工程师安全生产技术2009年安全工程师
类别:建筑类其它注册安全工程师注册安全工程师安全生产技术2009安全工程师《
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