单项选择题

According to the report, dust formation can be reduced when _________.

A．asbestos is damp
B．dry asbestos is employed
C．workers wear protective clothing
D．workers use asbestos in the open air
<上一题 目录 下一题>
热门 试题

单项选择题
Evidence from the economists and the building industries shows that _________.
A．exposure to asbestos fibers is cancer causing
B．asbestos is in extensive use in building industry
C．use of asbestos is being reduced gradually
D．exposure to asbestos fibers can be reduced
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 worker's skin with asbestos particles
C．the inferior quality of the asbestos itself
D．the excessive use of man-made asbestos material.
相关试题