胚胎在器官形成期受照可能引起在照射时正在发育的器官畸形，这在性质上属于（）

A.随机性效应

B.确定性效应

C.遗传效应

D.致癌效应

E.急性效应

It was raining heavily. Little Mary felt cold, so she stood _____ to her mother. [ ]

A. close

B. closely

C. colsed

D. closing