可引起疾病暴发的是（）
A.接触传播
B.诊疗手术传播
C.水和食物传播
D.各种制剂传播
E.虫媒传播
参考答案：A
The split between humans and apes is believed by scientists______15 to 20 million years ago.
A．to be occurring
B．having occurred
C．to have occurred
D．to occur
安保及保洁人员属于新型营业厅的自有人员。
