问答题 英译中The examples of Virtual Vineyards，Amazon.com，and other pioneers show that a Web site selling the right kind of products with the right mix of interactivity，hospitality，and security will attract online customers.

问答题 英译中Defenders of science have also voiced their concerns at meetings such as ’The Flight from S.cience and Reason’，held in New York City in 1995，and ’Science in the Age of （Mis）information，which assembled last June near Buffalo.

单项选择题 孕妇感染风疹后，可能引起胎儿畸形，这种传播方式称为（ ）。A．上行传播B．水平传播 C．医源性传播 D．垂直传播 E．Z 型传播