护士与病人交谈时主要使用的距离是()。
A.亲密距离
B.个人距离
C.社会距离
D.公众距离
E.安全距离
参考答案:B
使用电子功率油耗仪时,手扶或小四轮拖拉机应把油耗测量计的出油管接到()。
A、柴油滤清器的进油管
B、柴油滤清器出油管
C、油路中
D、高压油路中
The demand curves faced by monopolistic competitors is:()
A. inelastic due to the availability of many complementary goods.
B. elastic due to the availability of many close substitutes.
C. flat due to the allocative efficiency of price searcher markets.