A.prevent chain from clinging to the wildcat B.clean the marine debris from the chain C.flake chain from a boat's chain locker D.clean chain prior to an x-ray inspection
A.市人民檢察院B.市人民法院C.市國家安全機(jī)關(guān)D.市公安機(jī)關(guān)
A.混凝土板下空隙內(nèi)存在自由水B.軸載的反復(fù)作用C.細(xì)集料的供給D.低溫