第24题: [单项选择]A. It has been held for 10 years. B. It is held in New York every year. C. It is classified into 8 categories. D. It is a competition about technology. 参考答案:D 答案解析:[听力原文] Hundreds of students from around the world gathered in New York City last month for th
第34题: [单项选择]在0.50Kg水中溶入1.95×10-5Kg的葡萄糖,经实验测得此水溶液的凝固点降低值为0.402K则葡萄糖的质量为(水的Kf=1.86Kg·K/mol)()。 A. 0.100kg/mol B. 0.1804kg/mol C. 0.36kg/mol D. 0.0200kg/mol 参考答案:B