申请注册的护理专业毕业生，应在教学或综合医院完成临床实习，其时限至少为（）。

A.6个月

B.8个月

C.10个月

D.12个月

A special feature of education at MIT is the opportunity for students and faculty to ________ together

in research activities.

A. specialize  

B. participate

C. consist  

D. involve