【单选题】设地面 B 、 B′ 两点间相距 80m ,水准仪安臵在 BB′ 中点时,测得高 差 hBB′=+0.228m ;将水准仪移至离 B′ 点附近 2-3 米处,读取 B 点水准尺 上中丝读数 =1.666m , B′ 尺上中丝读数 =1.446m ,则仪器的 i 角为()。
【单选题】In London, how does they solve the problem of the traffic congestion?
A.
They take a completely-free bus service.
B.
They experimented a very cheap bus service.
C.
Part of the street is for buses only.
D.
They closed the streets to cars.
【单选题】设地面B、 B′两点间相距80m,水准仪安置在BB′中点时,测得高差hBB′ =+0.228m;将水准仪移至离B′点附近2-3米处,读取B点水准尺上中丝读=1.666m, B′尺上中丝读数=1.446m,则仪器的i角为( )。
【单选题】化工管路中,对于要求强度高、密封性能好、能拆卸的管路,通常采用( )
【单选题】设地面B、B′两点间相距80m,水准仪安置在BB′中点时,测得高差hBB′+0.28m;将水准仪移至离B点附近2-3米处,B′尺上中丝读数=1.438m,读取B点水准尺上中丝读数=1.656m则仪器的i角为()
【单选题】设地面B、B′两点间相距80m,水准仪安置在BB′中点时,测得高差hBB′=+0.228m;将水准仪移至离B′点附近2-3米处,读取B点水准尺上中丝读数=1.666m,B′尺上中丝读数=1.430m,则仪器的i角为( )。
【单选题】化工管路中,对于要求强度高、密封性能好、能拆卸的管路,通常采用()
【单选题】设地面B、B′两点间相距80m,水准仪安置在BB′中点时,测得高差hBB′=+0.228m;将水准仪移至离B′点附近2-3米处,读取B点水准尺上中丝读数=1.666m,B′尺上中丝读数=1.446m,则仪器的i角为( )
【多选题】The Contractor shall provide on the site in connection with the execution and completion of the Works and the remedying of any defects(). Only such technical assistants are skilled and experienced() t...