【单选题】A typical trend during a recession is that:
A.
the unemployment rate falls.
B.
the popularity of the incumbent president rises
D.
the inflation rate rises.
【单选题】杨老师在教授生字词的过程中发现部分学生有丢笔少画的现象,于是他把“小学生丢笔少画现象的原因及对策研究”作为自己的研究课题。他根据在工作中收集整理的资料提出可能的假设,再根据假设设计并实施教学措施,最后根据反馈信息进一步调整教学行动方案。这种研究方法属于( )。
【单选题】最早发现针孔成像原理并加以记录的我国古代科学家是( )。
【单选题】Which type of unemployment increases during a recession?
B.
frictional unemployment
C.
structural unemployment
D.
the natural unemployment rate
【单选题】which of the following conditions is most true during a recession:
A.
the natural rate of unemployment will increase dramatically
B.
output(real GDP) will be increasing
C.
actual output will exceed potential output
D.
potential output will exceed actual output
【单选题】During a recession, output declines resulting in
A.
lower unemployment in the economy.
B.
higher unemployment in the economy.
C.
no impact on the unemployment in the economy.
D.
higher wages for the workers.
【简答题】设某文件采取链接文件结构,由四个逻辑记录组成 ( 其大小与磁盘块大小相 等,均为 512B) ,并分别存放在第 100 、 157 、 66 、 67 号磁盘块上,画出该文件的结构,若要存取文件第 1560 逻辑字节处的信息,问要访问哪一个磁盘块 ? 需要进行多少次 I/O 操作 ?
【单选题】Which of the following typically rises during a recession? ( )
【单选题】Which of the following fall during a recession?
A.
both retail sales and employment
B.
retail sales but not employment
C.
employment but not retail sales
D.
neither employment nor retail sales