从目前艾滋病毒感染者的分布情况看,()成为艾滋病病毒传播最为迅速的地区。
A、亚洲、非洲
B、非洲、美洲
C、美洲、东欧
D、亚洲、东欧
参考答案:D
母线单相接地故障(不重合),当保护、重合闸和开关正确动作时,()采取切机切负荷措施。
A.允许
B.不允许
C.不确定是否允许
D.其他三个选项都不是
— Do you have this kind of MP5?
— Sorry, we _____ yesterday. You can come next week. [ ]
A. tried them on
B. took them off
C. sold them out