奥苏贝尔根据学习任务的复杂程度,将有意义学习分为三种类型:__________、__________和__________。
参考答案:代表性学习;概念学习;命题学习
It is reported that two schools, ____ are being built in my hometown, will open next year. [ ]
A. they both
B. which both
C. both of them
D. both of which
N-(1-萘基)乙二胺偶氮分光光度法测定水中苯胺类化合物时,当萘乙二胺盐酸盐出现浑浊时,应进行振荡待溶液澄清后使用。