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【单选题】
Which of the following statements is true according to the passage（）
A．It is difficult to pr 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 fires.
A.
Most forest fires are caused by human carelessness or ignorance. Forest fire prion, therefore, is mainly a problem of creating better understanding of the importance of forests, an awareness of the er of fire in the woods, and a sense of personal responsibility to safeguard the forests from er. This is not an easy job.
B.
Careless smokers are responsible for thousands of forest fires each year. Many of these are started when cigarette butts(烟蒂) and matches are thrown from automobiles. Others are caused by hunter, hikers(徒步旅行者), fishermen, or woods workers who are careless in disposing of their smoking materials. The Forest Service has posted rules in many of the National Forest that prohibit smoking except in certain designated (指定的)areas. Many of the states have laws against throwing lighted materials from automobiles. The prion of smoker-caused fires, however, depends upon changing the attitudes and behavior of millions of people who smoke in hazardous(危险的) area.
C.
The most important natural cause of fire is lightning(闪电). This accounts for 11 percent of forest fires on protected and for the entire nation. In the Western States, lightning causes a much higher percentage of fires than it does in the East.
D.
Advances in knowledge of fire weather are helping forest protection forces to know when to be alert to lightning-caused fires. Adequate and well-equipped forces can control them quickly and hold the damage to a minimum. Experiments in "seeding" thunder clouds to control the lightning itself have been in process for many years, but new breakthroughs are needed for any significant reduction in the fires lightning starts.
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参考解析：
刷刷题刷刷变学霸
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【单选题】如果甲和乙都没有考试及格的话，那么丙就一定及格了。 上述前提再增加以下哪项，就可以推出“甲考试及格了”的结论？（）
A.
丙及格了。
B.
丙没有及格。
C.
乙没有及格。
D.
乙和丙都没有及格。
【单选题】甲班有100人，其中： Ⅰ．有的人会游泳。 Ⅱ．有的人不会游泳。 Ⅲ．班长不会游泳。 已知以上关于游泳的三句话中一真两假，问：甲班有多少人会游泳？（）
A.
100人会。
B.
没有人会。
C.
99人会。
D.
只有1人不会。
【单选题】Lightning-caused fires can be controlled quickly by（） A．holding the fire damages to a minimum B．people who have changed their attitude and behavior C．enough fire fighters with good fire-fighting devic...
A.
Most forest fires are caused by human carelessness or ignorance. Forest fire prevention, therefore, is mainly a problem of creating better understanding of the importance of forests, an awareness of the danger of fire in the woods, and a sense of personal responsibility to safeguard the forests from danger. This is not an easy job.
B.
Careless smokers are responsible for thousands of forest fires each year. Many of these are started when cigarette butts(烟蒂) and matches are thrown from automobiles. Others are caused by hunter, hikers(徒步旅行者), fishermen, or woods workers who are careless in disposing of their smoking materials. The Forest Service has posted rules in many of the National Forest that prohibit smoking except in certain designated (指定的)areas. Many of the states have laws against throwing lighted materials from automobiles. The prevention of smoker-caused fires, however, depends upon changing the attitudes and behavior of millions of people who smoke in hazardous(危险的) area.
C.
The most important natural cause of fire is lightning(闪电). This accounts for 11 percent of forest fires on protected and for the entire nation. In the Western States, lightning causes a much higher percentage of fires than it does in the East.
D.
Advances in knowledge of fire weather are helping forest protection forces to know when to be alert to lightning-caused fires. Adequate and well-equipped forces can control them quickly and hold the damage to a minimum. Experiments in "seeding" thunder clouds to control the lightning itself have been in process for many years, but new breakthroughs are needed for any significant reduction in the fires lightning starts.
【单选题】IN 2005 Congress considered an emergency spending bill that designated $81 billion for military spending and Asian tsunami relief. It passed easily. A politician would have to be mighty confident to v...
A.
the federal government refuses to help with the cost.
B.
the implementation requires too much expenditure.
C.
it may bring too many troubles to management.
D.
immigrant advocates consider it unfair.