[单选题]Place the plate in a chamber containing ammonia vapour.此句的意思是将层析板( )。A.置于密室中B.喷氨水溶液C.置于氨水溶液中D.置于含氨蒸气的密闭容器中E.以上都不对
[单选题]A-frames are mounted on the bed plate and support () and cylinder block.A . the main bearingB . the cylinder coverC . the entablatureD . the sum
[单选题]The bed-plate is secured in the longitudinal direction by means of bolts known as ().A . end-chock boltsB . side-chock boltsC . through boltsD . tie rod
[名词解释] 英译中:Number plate
[名词解释] 固体培养基(solid.medium)
[名词解释] 涂布平板法(spread plate method)
[名词解释] 稀释倒平板法(pour plate method)
[单选题]Many types of rock are _____ from volcanoes as solid, fragmentary material.
[单选题]The science teacher demonstratedthe process of turning solid gold into liqu
[单选题]My watch fell down on the ground and there was a hairline crack in the( )of