--- I hear a number of workers in the factory ______ out of work.

--- Yes, and the number _______ quite huge.

A．are; is

B．is; are

C．is; is

D．are; are

联合国大会通过的《儿童权利公约》，确立了青少年儿童的社会权利主体地位，这一核心精神的基本原则是（）。

A．无歧视原则

B．保护儿童原则

C．儿童利益最佳原则

D．尊重儿童尊严原则

E．尊重儿童观点和意见原则