单项选择题
A.radial B.radiate C.radiator D.radiationChineseauthori……
ChineseauthoritiessaidTuesdaytraceamountsofatmospheric()fromJapanhavebeendetectedinBeijingandmanyareasotherthanHeilongjianginthenortheastbutstressed(强调)theyposenothreattopublichealth.
A.radial
B.radiate
C.radiator
D.radiation