题目

.In Britain, and on the Continent too, the Japanese are viewed _______ a threat to domestic industries.a. like b. as c. with d. for 答案：B以下不能被人体免疫系统直接识别的是                                     ①机体癌变的细胞                    ②血液中O2浓度的变化   ③环境中温度的变化                  ④感染人体的流感病毒     A．①③        B．②④      C．①④       D．②③