【判断题】洁净等级分别为1万级和10万级的空气,1万级的空气质量较高。
【单选题】Nowedays, there is a____ increase in children’s creativity,for they are greatly encouraged to develop their talents.
【单选题】Which of the aspects of telecommunication is NOT mentioned in the passage?
B.
Transmission of message.
D.
Government regulation.
【单选题】在Windows 7中,双击( )可使窗口最大化或还原。
【单选题】According to the passage, the educational changes were the result of ______.
A.
plans developed by conservative and church leaders
B.
efforts of interested individuals to redefine the educational system
C.
the demands of social organization seeking financial relief
D.
rallies held by westerners wanting to compete with eastern schools
【单选题】要检验某地区的人均消费水平是否等于1500元,在该假设检验中,第I类错误是指A
A.
该地区人均消费水平的实际值是1500元,检验结果却拒绝了原假设
B.
该地区人均消费水平的实际值是1500元,检验结果却未拒绝原假
C.
该地区人均消费水平的实际值不是1500元,检验结果却拒绝了原假设
D.
该地区人均消费水平的实际值不是1500元,检验结果却未拒绝原假设