第7题: [多项选择]唾液蛋白含有的下列3项成分为() A. 血清白蛋白 B. 富脯蛋白、富组蛋白、富酪蛋白 C. 唾液免疫球蛋白 D. 磷蛋白 E. 唾液酶类 参考答案:B, C, E 答案解析:唾液是由大小唾液腺分泌的混合液体,无色无味近于中性(pH6.6~7.1),正常成人每日分泌量1.0~1.5L,其中水分约占99%,其余成分主要是粘蛋白、球蛋白、尿素、尿酸、唾液淀粉酶、溶菌酶等有机物和
A. Because they are handled by computers. B. Because humans are not allowed to operate computers. C. Because there are no mistakes what so ever. D. Because computers do not steal money. 参考答案:A 答案解析:解析:参见第一段中的“their transactions are 'un touched by human hands' and therefore safe from human temptati