结核杆菌侵入肠道的土要途径是

A．经常吞咽开放性肺结核或喉结核的痰液

B．与开放性肺结核病人共用餐具

C．慢性血行感染

D．饮污染牛型结核杆菌的牛奶

This job is great        salary. However, it has several disadvantage, such as long working hours and inconvenient working place.

A．on behalf of

B．in addition to

C．thanks to

D．in terms of