细菌性食物中毒发病机制可分为（）、（）和（）。
参考答案：感染型；毒素型；混合型
(2014·北京东城区高三教学统一检测)In his speech，he said that it was his primary school teachers that he was fond of________influenced his whole life.
A．what
B．which
C．as
D．who
根据《电信条例》，电信业务经营者在电信网络设计、建设和运行中应做到与（ ）的需求同步。
A．国家安全
B．电信技术发展
C．电信网络安全
D．电信业务创新
E．市场交易安全
