【单选题】对幼儿园工作的各个方面具有约束力和强制性,被称为幼儿园的“法”的是( )
【单选题】导游服务在未来将出现以下趋向( )。①导游内容的高知识化②导游方法多样化③导游手段科技化
【判断题】导游服务在未来将出现以下四种趋向:导游内容的高知识化、导游手段的高科技化、导游方法的多样化和导游服务方式更加人情化。()
【单选题】The weak Japanese yen and cyclical price declines have ___ to slash prices on Korea’s key exports.
【单选题】Which one of the following statements about cyclical unemployment is not correct?______.
A.
Cyclical unemployment exists when there are more job vacancies than there are individuals looking for jobs.
B.
Cyclical unemployment exists when there is a GNP gap.
C.
Cyclical unemployment is not included in the natural rate of unemployment.
D.
The duration of cyclical unemployment is affected by the level of aggregate demand.
【单选题】设有关系 R,按条件f对关系R进行选择,正确的是 。