进口装备有放射性同位素的仪表的单位或个人，应向哪个部门登记备案（）
A.当地卫生部门
B.当地公安部门
C.当地环境保护部门
D.以上都需要
参考答案：D
He asked me for this book many times. Please tell him he ______ get it tomorrow.
A．must
B．would
C．shall
D．should
20世纪初实用主义教育学的代表人物是( )。
A．凯洛夫B．杜威C．布鲁纳D．赞柯夫
book many times. Please tell him he ______ get it tomorrow.