GB6682—1992《分析实验室用水规格和试验方法》标准中规定的技术指标包括();();()、可氧化物、蒸发残渣以及可溶性硅六项内容。
参考答案:pH值、电导率、吸光度
Though he has studied at Russian for ten months, he can still speak the language. [ ]
A. hard, hard
B. hardly, hardly
C. hard, hardly
D. hardly, hard
简述韩愈的教育思想。