题目

三大世界性宗教的形成，影响了世界各大古典文明体系。下列关于世界三大宗教的表述不正确的是  ( ) A．佛教、伊斯兰教的产生地在亚洲，基督教的产生地在欧洲   B．基督教在4世纪末，被罗马皇帝定为国教 C．伊斯兰教的创立与建立统一的国家有机结合   D．佛教反对将人分为等级，主张“众生平等”Cloud seeding is a method of artificially causing clouds to produce precipitation （降水） in the form of rain or snow．Cloud seeding has also been used in attempts to modify the severity of hail storms and hurricanes．The effectiveness of cloud seeding remains controversial （有争议的）．but it continues to be used in some regions to try to increase rainfall for agriculture and to build snow packs for water supplies and power production．Cloud seeding was developed by American scientists Irving Langmuir and Vincent Joseph Schaefer during and after World War II．Their work began as an effort to learn more about the buildup of ice on airplane wings, and eventually led them to attempt to create rainfall by releasing several pounds of crushed frozen carbon dioxide into a cloud from an airplane．In this form, the carbon dioxide is called dry ice．On November 13, 1946, the technique appeared to produce snow directly under the cloud; the snow then turned to rain as it fell to the ground．For their experiment, Langmuir and Schaefer selected a supercooled cloud, one in which the water droplets remain liquid in subfreezing temperatures．Their theory was that small grains of dry ice falling through the cloud would cause tiny droplets of water vapor in the cloud to freeze into crystals that attracted more water vapor．Their theory proved to be correct and eventually the crystals became heavy enough to fall from the cloud as snow．As the snow reached the warmer temperatures closer to the ground, it melted and became rain．Another scientist, Bernard Vonnegut, produced a method of cloud seeding using silver iodide （碘化银）．He used particles of silver iodide because its crystal structure resembled that of ice in clouds．Silveriodide also had practical advantages over frozen carbon dioxide It could be stored at room temperatureand did not require an airplane as a delivery mechanism．Instead, silver iodide crystals could be fired bycannons （大炮） high into the air, where wind carried them into the clouds．小题1:According to the text, Langmuir and Schaefer had intended to deal with__A．how to freeze carbon dioxide                      B．how to remove ice on plane wingsC．how to make weather forecast for the war             D how to hide planes in clouds at war小题2:What is the CORRECT order of the course for cloud seeding with dry ice?a．snow becoming rain in wanner temperatures             b．crystals attracting more water vaporc．crystals falling in the form of snow                     d．crystals becoming very heavye．freezing tiny droplets of water vapor into crystalsf．putting small grains of dry ice in the cloudA．a-c-f-d-b-eB．b-f-e-a-c-dC．f-e-b-d-c-aD．e-a-d-c-b-f小题3:Bernard chose silver iodide as a method of cloud seeding because___．A．it is much cheaper than dry iceB．it can be stored at any roomsC．it can be sent into clouds by windD．it is similar小题4:The best title for the passage may be "____"．A．Cloud SeedingB．Artificial RainingC．Weather ChangingD．Cloud Gathering小题5:How many methods of cloud seeding are mentioned in the passage?A．three B．twoC．oneD．four