湿陷土、膨胀土、流沙地区的雨水管道,必须经()试验合格后方可投入运行。
A.水压
B.严密性
C.满水
D.强度
参考答案:B
在社会经济运行中,当通货膨胀率上升时,一般会导致( )。
A.失业率上升 B.失业率保持稳定不变 C.失业率下降 D.失业率波动不定
Obama’s father was among the first to settle in ________ is known as the most fantastic tourist attraction--Hawaii.
A.where
B.what
C.which
D.that