下面哪一项会使总需求曲线向左移动?________。
A. 政府在产品和服务上支出的减少
B. 价格水平的上升
C. 税收减少
D. 外国收入增加
E. 价格水平下降
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The objectives of the ISM Code are to ensure ①safety at sea②prevention of human injury
A. ①
B. ②
C. ②③
D. ①②③
What is the most usual reason for the fresh water-sea water heat exchanger fouling in the
A. lube oil sludge accumulating in it
B. dirt and scale etc , formed on the surfaces
C. deformation of the tubes and the shell or the plates
D. lube oil leakage into sea-water side
为什么价格水平的上升会使得实际GDP的需求量下降?
在寒冷地区航行轮机部必须做到: 1.对救生艇机、应急发电柴油机带动的应急救火设备,向冷却水中添加防冻剂,做好保温加热工作。 2.保持机舱或舱室的温度,关妥门窗和通风口,必要时给以加热。