【单选题】设 , 为任意非零向量,下列结论中正确的是( )
【单选题】The river is too dirty _____.
【单选题】The river is too dirty to _____.
【单选题】______ such heavy pollution already, it may now be too late to clean up the river.
【单选题】—Look! There is a big river. Let's swim in it! —No, I think it's _______ dangerous. [ ]
【单选题】设 , 为任意非零向量,下列结论中正确的是( ).
【单选题】The river is too dirty ______.
【单选题】This river is too wide for the swimmers _________.
【单选题】以下哪个是溶组织内阿米巴大滋养体经铁木素染色后的特点
【单选题】The river is __ wider than that river. [ ]