twice a year, whether it is a car or a bus or a truck, is the rule that every driver must obey in this city．

A．Examining

B．Examined

C．Being examined

D．Having been examined

据统计，由女性艾滋病患者所生育的孩子中，大约有1∕3的孩子会成为新的艾滋病感染者，那么，这种母婴传播的途径最有可能是 (      )

①胎盘传播 ②产道传播 ③母乳传播 ④餐具传播 ⑤空气传播

A．①②④

B．②③④

C．③④⑤

D．①②③