题目内容
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What does the author think of the second approach to pollution control？
A．It is the most effective of the four.
B．It is effective in some way.
C．It is economical but not at all effective.
D．It is not economical.
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B．regulations should be made to guide the science of cloning humans onto the right track
C．the research on cloning humans should not be conducted so recklessly
D．Antinori is a great scientist who pushes reproductive biology to the limits
B．It damages company-customer relations
C．It makes the company lose a lot of money
D．It protects honest ticket-paying passengers
B．Working with colleagues at the office
C．Sleeping normal hours．
D．All the above
—Large quantities of wheat ______ abroad.
A．are sent B．have sent C．is sent D．is being sent
A、silica
B、calcium
C、carbonate
D、iron oxides
A．control less visible as well as less hazardous chemical pollutants
B．increase the costs of pollution control and waste material disposal
C．have more strict control over less evident but often dangerous pollutants
D．eliminate all the hazardous chemical and gaseous pollutants
A．Laws have been made to develop pollution-treatment systems.
B．Pollution-treatment systems have been effective in reducing the massive quantities of water and air pollutants.
C．Materials from waste treatment processes can be made useful again.
D．The cost of pollution treatment is proportionally smaller than that of damage to the environment.
A．to discuss the ways of and problems in pollution control
B．to give suggestions about pollution control legislation
C．to compare and contrast the four approaches to pollution control
D．to describe what has been achieved in pollution control
A．locked up by one of the parties
B．offering many electoral votes
C．that could easily fall by the wayside
D．where the competition could easily win
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