He went ahead（）all warnings about the danger of his mission.

A.in case of

B.in place of

C.in spite of

D.regardless of

下列哪段妊娠时间，胚胎发育易受职业有害因素影响而致畸（）。

A．3~8周

B．受精后11天

C．8~12周

D．1~2周

E．无明显时间阶段