未知题型
食源性疾病中威胁生命致害因子有A.肉毒梭菌 B.产气荚膜杆菌 C.志贺菌 ###S
A食源性疾病中威胁生命致害因子有肉毒梭菌；食源性疾病中引起严重后果或慢性病的因子有志贺菌。
单项选择题 In another months time, Henry ______ in the Weavewell Woolen Companys office for five years. A．will be working B．has been working C．has worked D．will have been working
未知题型 影响基牙受力大小的因素中错误的是
未知题型 浴室应设气窗，气窗面积应为地面积的A.1％ B.2％ C.5％ D.10％ ###SX
