下列各项属于甲类传染病的是()。
A.艾滋病
B.乙肝
C.非典型性肺炎
D.霍乱
E.伤寒
参考答案:D
Though it was the first time that I ______ the small town, I fell in love with it at once.
A.was visiting
B.visit
C.have visited
D.had visited
一类高层建筑应按( )负荷要求供电,二类高层建筑应按( )负荷要求供电。
A.特级,一级,
B.一级,二级
C.A级、B级
D.二级,三级