单项选择题

关于低压钠灯的优点，下列说法正确的是（）

A、耗电省；
B、发光效率高；
C、穿透云雾能力强；
D、显色性好；

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单项选择题

常用于促进人们改变生活方式的技术包括（）

A.教育
B．激励
C．训练
D．营销

Q7 P 12. In the 352 years since then there have been moments that might have been construed as republican opportunities. There was a bad run for the monarchy in the early 19th century: George III (1760-1820) became demented; George IV (1820-1830) was a licentious fat laughing-stock, and William IV (1830-1837) a dimwit. ButBritain’s faith in its system had been cemented by the excesses of the French Revolution: “there is a distinction between the unpopularity of the monarch and the unpopularity of the monarchy,” says Professor Rodney Barker of the London School of Economic According to Rpdney, what is the distinction between "monarch" and "monarchy"?

答案： A