--I think our school’s selective courses are of great use and I have learnt a lot from them.

--Yes _______.

A．No problem

B．I couldn’t agree with you more

C．I don’t think so

D．It doesn’t matter

下列有关营养成分与人体健康关系叙述中，错误的是

A．缺铁元素会患贫血症

B．缺钙元素会导致骨质疏松

C．微量元素在人体内虽然含量很少，但摄入量的多少将直接影响身体健康

D．缺碘元素会使儿童发育停滞，严重的会导致侏儒