题目内容

The splendid dress enhanced her beauty.

A. improved
B. endangered
C. ignored
D. shared

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样品在五色火焰中燃烧,火焰呈鲜黄色

A. 青霉素钾
B. 硫酸阿托品
C. 醋酸氟轻松
D. 苯巴比妥钠
E. 甘油
F. 以下鉴别的药物是

In a 1983 newspaper poll, Ann Landers, an advice columnist, was listed among the twenty-five most influential women in the United States.

A. survey
B. article
C. headline
D. conclusion

第一篇 The Volcano Geologists have been studying volcanoes for a long time. Though they have learned a great deal, they still have not discovered the cause of volcanic action. They know that the inside of the earth is very hot, but they are not sure exactly what causes the great heat. Some geologists have thought that the heat is caused by the great pressure of the earth’s outer layers. Or the heat may be left from the time when the earth was formed. During the last sixty years scientists have learned about radium, uranium, thorium and other radioactive elements. These give out heat all the time as they change into other elements. Many scientists now believe that much of the heat inside the earth is produced by radioactive elements. Whatever the cause of the heat may be, we do know that the earth gets hotter the farther down we dig, in deep mines and oil wells the temperature rises about 10F for each 50 feet. At this rate the temperature 40 miles below the earth’s surface would be over 40000F. this is much hotter than necessary to melt rock. However, the pressure of the rock above keeps most materials from melting at their usual melting points. Geologists believe that the rock deep in the earth may be plastic, or puttylike, in other words, the rock yields slowly to pressure but is not liquid. But if some change in the earth’s crust releases the pressure, the rock melts. Then the hot, liquid rock can move up toward the surface. When the melted rock works its way close to earth’s crust, a volcano may be formed. The melted rock often contains steam and other gases under great pressure. If the rock above gives way, the pressure is released. Then the sudden expansion of the gases causes explosions. These blow the melted rock into pieces of different sizes and shoot them high in the air. Here they cool and harden into volcanic ash and cinders. Some of the material falls around the hole made in the earth’s surface. The melted rock may keep on rising and pour out as lava. In this way, volcanic ash, cinders and lava build up the cone-shaped mountains that we call volcanoes.

A. formation of volcanoes
B. results of volcanic action
C. work of geologists
D. interior of the earth

某本科一专业按如下原则选拔特别奖学金的候选人:将本专业的同学按德育情况排列名次,均分为上、中、下三个等级(即三个等级的人数相等,下同),候选人在德育方面的表现必须为上等;将本专业的同学按学习成绩排列名次,均分为优、良、中、差四个等级,候选人的学习成绩必须为优;将本专业的同学按身体状况排列名次,均分为好与差两个等级,候选人的身体状况必须为好。假设该专业共有36名本科学生,则除了以下哪项外,其余都可能是这次选拔的结果( )

A. 恰好有四个学生被选为候选人
B. 只有两个学生被选为候选人
C. 没有学生被选为候选人
D. 候选人数多于本专业学生的1/4

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