[填空题] 白乳胶的学名是（），是一种（）色高分子乳液。它可在（）度的范围内使用。

某人投资了三种股票，这三种股票的方差一协方差矩阵如下表所示，矩阵第（i¸；j）位置上的元素为股票I与j的协方差，已知此人投资这三种股票的比例分别为0.3、0.3、0.4，则该股票投资组合的风险是（） ["9.0","8.9","12.5","9.7"] 风格主义的艺术特点？ 现代水利与传统水利的差异有哪些？ What is the difference between a CSU/DSU and a modem?（） [" A CSU\/DSU converts analog signals from a router to a leased line; a modem converts analog signals from a router to a leased line."," A CSU\/DSU converts analog signals from a router to a phone line; a modem converts digital signals from a router to a leased line."," A CSU\/DSU converts digital signals from a router to a phone line; a modem converts analog signals from a router to a phone line."," A CSU\/DSU converts digital signals from a router to a leased line; a modem converts digital signals from a router to a phone line."] 课程与教学评价的功能有：导向功能、诊断功能、（）功能、（）功能和发展功能。 白乳胶的学名是（），是一种（）色高分子乳液。它可在（）度的范围内使用。