跟踪导练（四）（1）,此文是一篇跟踪论文范文,为你的毕业论文写作提供有价值的参考。
跟踪论文参考文献：
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A
In a mountainous area of Brazil, there is a kind of beautiful butterfly which can kill men. If people meet them, they will come down in great quantities to bite and kill, sucking （吸） blood and eating flesh through the wounds they cause.
In June, 1966, a boy named Marl Andre who went into the mountains in search of butterfly specimens （标本） was killed by these butterflies. A country boy saw him as he was just about to raise his net to catch a butterfly. Suddenly thousands of butterflies came down upon him, covering him all over. The boy struggled and cried as he tried to free himself from their attack. Finally he fell senseless to the ground. Police examined his body and proved that he had died of bites by butterflies.
In New Guinea, there is a kind of needlefish which also kills men. Because it likes light at night, it will swim near the lights of fishing boats, then suddenly shoot out of water like an arrow to its target, and force its 3-inch sharp mouth into a human body. Often people are thrust （戳） in the eye, or through the chest or stomach, resulting in death. Sometimes it will even attack the people in a fishing boat in broad daylight.
About 10 persons in the world are killed by sharks every year, yet more than 20 are killed by needlefish every month.
1. Marl Andre was killed when he ___ .
A. raised a netB. went to Brazil
C. entered the mountainsD. tried to catch a butterfly
2. Needlefish comes out ___ .
A. sometimes at night
B. usually in the daytime
C. both at night and in the daytime
D. only when boats appear at night
3. According to the story, each year needlefish kills ___ .
A. twice more than sharks do
B. fewer persons than sharks do
C. 24 times more persons than sharks do
D. about 10 more persons than sharks do
4. What’s the best title of the passage?
A. Killer Butterflies and Needlefish
B. New Guinea—Not Fit to Live In
C. Brazil Home of Dangerous Butterflies
D. Deaths Caused by Butterflies and Needlefish
B
Against the supposition that forest fires in Alaska, Canada and Siberia warm the climate, scientists he discovered that cooling may occur in areas where burnt trees allow more snow to mirror more sunlight into space.
This finding suggests that taking steps to prevent northern forest fires to limit the release （释放） of greenhouse gases may warm the climate in northern regions. Usually large fires destroyed forests in these areas over the past ten years. Scientists predict that with climate warming, fires may occur more frequently over next several centuries as a result of a longer fire season. Sunlight taken in by the earth tends to cause warming, while heat mirrored back into space tends to cause cooling.
结论：关于本文可作为相关专业跟踪论文写作研究的大学硕士与本科毕业论文跟踪论文开题报告范文和职称论文参考文献资料。
跟踪导练（五）
选词填空用方框里单词的正确形式填空，使其句意完整。每空一词，有两个词是多余的。trainexpertfrightenabandonrelax。
跟踪导练（三）
ARiding SchoolYou can start horse-riding at any age Choose private or。
跟踪导练（四）
AWhen humans and nature go head to head， nature often ends up losing R。
跟踪导练（二）
ADuring my high school years， the most important thing was what I was w。