海关对加工贸易进出口货物的监管制度有（）环节。
A、登记审核
B、申报审单
C、征税
D、核销结案
E、查缉走私
参考答案：A, B, D
一束光入射到平面镜上发生反射，若反射角为 30°。则入射光线和镜面的夹角为________°。
—Who has taken my pen away?
—__________. He was here a moment ago.
A．It must be Li Ping
B．It is Li Ping take
C．Li Ping is
D．Li Ping must take
