It is the _________ in Britain that young people often do not shake hands when they meet someone for the first time.

A．custom

B．habit

C．hobby

D．favour

人民代表大会制度是我国的根本政治制度。坚持和完善人民代表大会制度，核心是  [ ]

A、加强人大的自身建设

B、坚持民主集中制原则

C、落实人大的各项职能

D、坚持中 * * 党的领导