A．The mass of one of the particles doubled.
B．The charge on both particles doubled.
C．The charge on one particle was halved.
D．The distance between the charges was doubled.
E．The charge on one particle was quadrupled, while the other was halved.

A.提高劳动效率
B.体现公平正义
C.实现共同富裕
D.提高经济效益

A．去氧糖苷
B．碳苷
C．β-D-或α-L-苷
D．α-D-或β-L-苷
E．硫苷

A.爱国、创业、求实、奉献
B.敢闯敢试、敢为人先、埋头苦干
C.自力更生、艰苦创业、团结协作、无私奉献
D.牢记使命、艰苦创业、绿色发展

A．对称度
B．位置度
C．圆柱度
D．平面度