【单选题】当同排纵筋中既有通长筋又有架立筋时,应用符号( )将通长筋和架立筋相联
【多选题】发酵液的pH值直接影响发酵液中某些物质的(),适当调节pH可改善其过滤特性。
【多选题】关于离心式压缩机的喘振原因,下列说法正确的是( )。
A.
当离心式压缩机的吸入流量小于喘振点后,压缩机的出口压力会突然下降,使得出口管线中的气体向压缩机倒流
B.
压缩机的流量增加,出口压力恢复正常,将倒流的气体压出去
C.
压缩机的吸入流量小于喘振点,压缩机会再度重复上述过程
D.
机组和管线产生压力脉动,并发出很大的声响,引发机组强烈振动
【单选题】Being in no great hurry, _____.
A.
we went the long route and scenery
B.
the long, scenic route was our preference
C.
we took the long, scenic route
D.
our preference was taking the long, scenic route
【判断题】变电所带电设备的一切作业,均必须按安规规程的规定严格执行
【单选题】Being in no great hurry, ______.
A.
we went the long route
B.
the long scenic route was our preference
C.
we took the long, scenic route
D.
our preference was taking the long, scenic route