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【参考答案】

If you∧do→don’t。
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单项选择题
According to the passage, it can be deduced that______.
A．in the future DNA technology will dominate the industry and agriculture
B．in the future DNA technology will disappear from the world
C．in the future DNA technology will be a dilemma in a long time
D．in the future the human beings derived from the DNA technology will take over the earth
单项选择题
From this passage, we can conclude that______.
A．education is beneficial to mental development
B．education protects the brain from shrinking
C．education has a protective effect against mental decline
D．education affects overall brain structures
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