【判断题】化工厂排出来的废水有有害性、富氧性、酸碱性、耗营养性等特点
【判断题】化工厂排出来的废水有有害性、富氧性、酸碱性、耗营养性等特点。
【单选题】She ______ high levels of lead in her drinking water.
【单选题】The rise in water levels is especially erous for small island nations and __.
C.
people who live on the beach
【单选题】健美操手型中的“合掌”应五指( )并拢。
【单选题】Tides are superimposed on nontidal rising and falling water levels,caused by ______.
【单选题】如果晶体二极管的正反向电阻都很大,则该晶体二极管( )。