【单选题】滚动轴承当工作温度低于密封用脂的滴点,速度较高时,应采用()密封。
【单选题】The word “dragon” in Chinese has a _________ connotative meaning.
【单选题】Each entity in a database has a unique attribute called a(n) ________.
【判断题】The variable occupation has the attribute of plumber.
【单选题】—The dragon has become a symbol of the Chinese nation. —__________
【判断题】The variable plumber has the attribute of occupation.
【多选题】下列关于教育心理学发展进程的说法,正确的有( )
A.
第一次提出“教育教学的心理学化”的思想是在初创时期