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>> 国家开放大学 / 知识产权法
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佳题速递：
1937年，中国洛川政治局扩大会议指出，争取全民族抗战胜利的关键是A.坚持共产党在统一战线中的独立自主原则B.开展抗日游击战争，建立敌后根据地C.放手发动群众，争取抗日民主D.实行全面抗战路线，反对片面抗战路线中国近现代史纲要 接触牛痘疫苗后产生对天花的抵抗性，这反映了 医学免疫学 苏轼的第一首豪放词是（ ）。 A、 《江城子·密州出猎》 B、 《念奴娇·赤壁怀古》 C、 《水调歌头》（明月几时有） D、 《定风波》（莫听穿林打叶声）中国古代文学（2） 4、The dark smoke that comes out of stacks (大烟囱) or from a burning dump (垃圾) contains tiny bits of solid or liquid matter. The smoke also contains many gases, most of which cannot be seen. Altogether, they make up the serious problems of air pollution. In so many places it keeps us from seeing the sun, irritate (刺痛) our eyes, causes us to cough and makes us ill.
Air pollution can spread from city to city. It even spreads from one country to another. Some northern European countries have had "black snow" from pollutants that have traveled through the air from other countries and have fallen with the snow. So air pollution is a global problem. It can kill babies, older people and those who have respiratory (呼吸) disease. In 1952, four thousands people die in one week as a result of a serious air pollution breakout in London. In 1948 in a small town of Pennsylvania, 20 people died in a four - day period of air pollution. As often found in cities, air pollution increases the risks of lung disease, such as bronchitis and asthma. Of course, smoking and other factors help to cause these illnesses, too, but these causes have increased greatly during recent years as air pollution has become worse.统考英语阅读理解 33、二进制数01011011B转换为十进制数是______。
A.103
B.91
C.171
D.71计算机统考 N型半导体的多数载流子是自由电子, 因此N型半导体带负电 电工电子技术