A.It iS blue.
B.It iS white.
C.It is grey.
D.It has no color.
A.To study when plants will have their first buds.
B.To find out the types of plants in the neighborhood.
C.To collect life cycle data on a variety of common plants from across the United States.
D.To investigate how plants and animals will respond as the climate changes.
开始考试点击查看答案A.Only experts can participate in it.
B.Everybody can participate in it.
C.It collects life cycle data on a variety of common plants.
D.It has its own website.
开始考试点击查看答案A.a citizen journalist
B.a citizen scientist
C.a scientist
D.a citizen
开始考试点击查看答案A.To develop a specific research interest and become professional scientists.
B.To send their research observations to a professional database.
C.To increase their knowledge about climate change.
D.To keep a record of their research observations.
开始考试点击查看答案A.to provide their personal life cycles
B.to observe the life cycle of plants
C.to collect data of the life cycle of living things
D.to teach children knowledge about climate change
开始考试点击查看答案A.the air will be too thin to support its wings.
B.the air will become thicker.
C.the air will exert pressure on it.
D.the air will disappear in no time.
开始考试点击查看答案A.it looks like a balloon.
B.it is much lighter than an airplane.
C.it doesn't have wings.
D.it works like an untied balloon.
开始考试点击查看答案A.It can fly when there is no air.
B.It can fly without wings.
C.It is made of strong metal.
D.It is propelled by burning gas inside it.
开始考试点击查看答案A.hot gas rushes out of its head.
B.it is powered by gas.
C.hot gas rushes out of its bottom.
D.hot gas rushes out of its neck.
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
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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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