第8题: [单项选择]用标准铂铑10—铂热电偶校验镍铬—镍硅热电偶。在800℃校验点附近得标准热电偶的平均热电势标(800,0)=7.376mV,被校热电偶平均热电势校(800,0)=33.604mV。已知标准热电偶证书上写明,对应800℃的热电势E(800,0)=7.342mV,则校验用加热电炉内的实际温度应为()。 A. 800℃ B. 803℃ C. 797℃ D. 805℃ 参考答案:B 答案解析:根据标准铂铑10—铂热电偶分度表判断。
第28题: [单项选择]When the writer says "it's very real" in the last paragraph (Line 2), he means ______. A. production is very important B. there are markets everywhere C. selling a thing is a business D. the market is a practical thing 参考答案:D
第34题: [单项选择]Wordsworth was one of the greatest poets______ lived in the 19th century. A. that B. who C. which D. he 参考答案:A 答案解析:[考点] 定语从句中的关联词 [解析] 在定语从句中,当先行词被序数词或形容词的最高级修饰时,常用关系代词that。从句中的poets前有形容词的最高级形式the greatest,故选A。