单项选择题

The author wants to tell us in Par

A．1-4______.A. DNA' s functionsB. DNA' s applicationsC. DNA' s researchD. DNA' s techniques
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单项选择题
What is the main idea of Par
A．5-7(last three paragraphs)A. DNA' s future tendencies.B. DNA' s controversy.C. DNA' s potentials.D. DNA' s social issues.
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
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