— The shoes are very nice. I’ll take them.

— You’d better ______ first. I’m afraid the size is a bit small for you.

A．pay for them

B．take them off

C．put them on

D．try them on

我国国家标准按约束性可分为

A．强制性标准、试行标准、推荐标准
B．强制性标准、推荐性标准
C．强制性标准
D．推荐性标准
E．试行标准