A:①④
B:①②
C:②③
D:③④
Although at the age of 30 and much older than the other players, Zhang Ning __________ to win the gold medal in the final match.
党的十八届五中全会决定全面放开二胎政策,对月嫂的消费需求产生了一定刺激,月嫂薪水飙升,进一步催热月嫂服务行业。不考虑其他因素,能正确反映这种变动传导效应的是( )(注:D、S为变动前,D1、S1为变动后)
有关电压和电动势的说法中错误的是( )