第9题: [单项选择]反映体内最近期、近期、远期功能硒水平的指标分别为() A. 血小板、血浆、红细胞谷胱甘肽过氧化物酶活性 B. 血小板硒、血浆硒、红细胞硒、发硒 C. 血浆、血小板、红细胞谷胱甘肽过氧化物酶活性 D. 血小板硒、红细胞硒、血浆硒、发硒 E. 红细胞、血浆、血小板谷胱甘肽过氧化物酶活性 参考答案:A
第25题: [单项选择]Questions 19-22 are based on the following dialogue:Which is not true about solar heat collector panels A. They look like sandwiches. B. They can heat but not cool homes. C. They cost about $ 300 each. D. They are placed on rooftops. 参考答案:B 答案解析:本题要求找出与对话不符的选项。A、C、D项都与对话相符,只有B项不符,原文“An increasing number of companies are selling solar collector