【单选题】Short-run fluctuations in output and employment are called:
B.
the classical dichotomy
D.
productivity slowdowns.
【单选题】若你的手指不慎被划伤,会感到痛,这种痛觉说明皮肤中含有( )
【单选题】Which of the following is NOT a Nobel Prize winner in Literature?
【单选题】设某单片机的晶振频率为 12 MHz,则其机器周期为__________。
【单选题】有一冷却器,以蒸汽作为热剂来加热物料温度,现选择蒸汽流量为操纵变量,物料出口温度为被控变量,若被加热物料温度不能太高,否则对后续生产不利角度来考虑,则( )
【单选题】()是表示事物的质的特征,是不能以数值表示的。
【单选题】Which of the following poets is a Nobel Prize winner?
【单选题】Sectoral shifts in demand for output
A.
create structural unemployment.
B.
increase unemployment due to job search.
C.
immediately reduce unemployment.
D.
do not affect demand for labor.
【单选题】Economists call the changes in the composition of demand among industries and regions:
A.
insider-outsider conflicts.
【判断题】有一冷却器,以蒸汽作为热剂来加热物料温度,现选择蒸汽流量为操纵变量,物料出口温度为被控变量,若被加热物料温度不能太高,否则对后续生产不利角度来考虑,则执行器应选气开阀、控制器为正作用方式