The Railway Labor Mediation Act of 1926 supported the use of collective bargaining to avert interruption of rail service.

单项选择题Winston became quite avaricious in his late life.

单项选择题The term “composition” refers to the way the components of a drawing are arranged by the artist.

单项选择题Biologists have ascertained that specialized cells convert Chemical energy into mechanical energy.

单项选择题As nineteenth-century American cultural aspirations expanded, women stepped into a new role as interpreters of art, both by writing works on art history and by teaching art.

单项选择题Nitrogen is the most plentiful gas in the atmosphere.