人体触电，按照人体接触带电体的方式分为：一相触电，（）触电，和（）触电三种情况。
参考答案：两相；跨步电压
North Shore Excursions faces a downward sloping demand curve, hasthree identifiable customer groups with the same elasticity of demand, and can prevent resale of the product. Can North Shore profit from pricediscrimination and in general, does a firm that engages in pricediscrimination achieve more gains from customers with elastic or with inelastic demand Can North Shore profit Higher gain from customers with:（）①A. Yes Elastic demand ②B. Yes Inelastic demand ③C. No Inelastic demand
A. ①
B. ②
C. ③
饮食心理学的主要研究对象是人，是人们在饮食生活中出现的饮食心理，饮食（）和饮食行为等。
A、态度
B、消费
C、过程
D、动机
