验槽时应重点观察()。
A、开挖坡度是否与方案相符
B、桩基、墙角部位
C、基槽边坡稳定性
D、承重墙下部位
E、其他受力较大部位
参考答案:B, C, D, E
在3S + 6KOH = 2K2S + K2SO3 + 3H2O 反应中,做氧化剂的S原子与做还原剂的S原子的物质的量之比是( )
A.1:2
B.2:1
C.1:3
D.3:1
_____no doubt that someone _____ the wooden box containing the most precious treasures from
the carrier under the cover of darkness.
A. It is; removed
B. There is; removed
C. It is; moved
D. there is; moved