单项选择题

In order to reduce the asbestos risk, the report gives the following suggestions except______

A．selecting appropriate type and state of asbestos
B．using wet asbestos instead of dry one
C．using hand tools instead of machine tools
D．working in an open place
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单项选择题
Exposure to asbestos fibers is harmful to people's health,______
A．so the use of asbestos is limited
B．but asbestos will continue to be used for a long time to come
C．so other new kinds of materials are under development
D．but they will not be so when ventilation devices are used
单项选择题
It can be inferred from the passage that the real danger comes from______
A．the asbestos dust that people take in
B．the contact of the workers skin with asbestos particles
C．the inferior quality of the asbestos itself
D．the excessive use of man-made asbestos material
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