单项选择题

This passage is chiefly about ______.

A．smoking in forests
B．changing the attitudes and behavior of millions of people
C．the chief causes; of forest fires and their prevention
D．advances in knowledge of fire weather

<上一题目录下一题>

热门试题

单项选择题

Which of the following statements is true according to the passage

A．It is difficult to prevent forest fires.
B．Smoking is allowed only in certain forests.
C．11% of the forest fires in the Western States are caused by lightning.
D．Experiments in "seeding" thunder clouds have helped reduce lightning-caused forest rues.

单项选择题

Preventing smoker-caused forest fires is mainly a problem of ______.

A．building the proper knowledge and habits in human beings
B．safeguarding the forests from fire
C．posting roles in forests
D．holding the damage to minimum