A.抵押权
B.质押权
C.保证
D.留置权
第2题
Scientists now understand why people's mental faculties decline at different rates.
A.Y
B.N
C.NG
第3题
Why are some scientists interested in studying senescence?
A.They want to increase the general ability of our bodies.
B.They may be able to find a better way to our life.
C.If they can pin down the biochemical process that makes us age, there will be hope for extending the length of life.
D.They want to find out ff there is a link between how efficiently a cell could repair itself and how long a creature lives.
第4题
Why are some scientists interested in studying senescence?
A.They want to increase the general ability of our bodies.
B.They may be able to find a better way to our life.
C.If they can pin down the biochemical process that makes us age, there will be hope for extending the length of life.
D.They want to find out if there is a link between how efficiently a cell could repair itself and how long a creature lives.
第5题
Why are some scientists interested in studying senescence?
A.They want to increase the general ability of our bodies.
B.They may be able to find a better way to our life.
C.If they can pin down the biochemical process that makes us age, there will be hope for extending the length of life.
D.They want to find out if there is a link between how efficiently a cell could repair itself and how long a creature lives.
第6题
Why does the professor mention fossils?
A.To describe the evidence Wegener used to develop his theory.
B.To suggest that Wegener borrowed ideas from earlier scientists.
C.To explain how Wegener first became interested in geology.
D.To show why most scientists ridiculed Wegener's theory.
第7题
Why are some scientists interested in studying senescence?
A.They want to increase the general ability of our bodies.
B.They may be able to find a better way to our life.
C.If they can pin down the biochemical process that makes us age, there will be hope for extending the length of life.
D.They want to find out if there is a link between how efficiently a cell could repair itself and how long a creature lives.
第8题
Why are some scientists interested in studying aging problem?
A.They want to increase the general ability of our bodies.
B.They may be able to find a better way of our life.
C.If they can pin down the biochemical process that makes us age,there will be hope for extending the length of life.
D.They want to find out ifthere is a link between how efficiently a cell could repair itself and how long a creature lives.
第9题
Why is the woman interested in working with Professor Smith?
A.She wants to quit her job in the chemistry job.
B.She’s wants to get practical experience.
C.She's interested in becoming a psychology major.
D.She wants to earn extra money.
第10题
Why are some scientists interested in studying aging problem?
A.They want to increase the general ability of our bodies.
B.They may be able to find a better way of our life.
C.If they can pin down the biochemical process that makes us age, there will be hope for extending the length of life.
D.They want to find out if there is a link between how efficiently a cell could repair itself and how long a creature lives.
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