单项选择题

A．It is dear to find printed materials.B．Frequent editi……

Which of the following situations is among the troubles print has

A．It is dear to find printed materials.
B．Frequent editing is needed for better layout.
C．Paper is passed around quickly.
D．The space to restore articles is not enoug

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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

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

单项选择题What does the author want to tell us in Par

A．4 to Para. 9A. New technology used in public transportation.B. The future trends in public transportation.C. The automation through new technology.D. Advanced transit concepts.

单项选择题If you have physical handicaps, what kind of transit system can you use

A．Conventional transportation services.
B．Public transportation.
C．Suspended monorails.
D．All transit services which are accessible to the disable