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【单选题】
重金属从悬浮物或沉积物中重新释放属于二次污染问题,下列( )原因可能诱发重金属释放。A.
颗粒物聚沉
B.
降低水体的pH值
C.
水流速度加快
D.
富营养化加重
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反馈参考答案：
举一反三
【简答题】针对防晒化妆品,激发消费者的问题认识。
【简答题】The children in our family are always ______ (respect) to their elders.
【单选题】The Minister for Community Development thought long and hard about how to ______ the social problems of the poor areas.
A.
remedy
B.
relieve
C.
assist
D.
associate
【单选题】Your _______ as a student will be excellent if you develop a habit of reflecting on how you learn.
A.
operation
B.
performance
C.
growth
D.
character
【单选题】The children in our family are always _____________ to their elders.
A.
respect
B.
respective
C.
respectful
D.
respectable
【单选题】The main idea of the passage is______.
A.
why train the imagination
B.
how to develop visual thinking
C.
why use our senses
D.
how to create new objects in the mind
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