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【简答题】
试分析酸雨的形成原因?有哪些影响因素?如何界定降水是否酸化?如何控制酸雨?
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【单选题】She seems to have______ without trace. No one can find her.
A.
vanished
B.
relinquished
C.
established
D.
banished
【简答题】principle, principal A The aim of the policy is to bring peace to the area. B Discussing all the details will get us nowhere: we must go back to basic . C The Danube is one of the rivers of Europe. D ...
【单选题】She seems to have______ without trace. No one can find her.
A.
vanished
B.
aspired
C.
established
D.
entitled
【单选题】She seems to have______ without trace. No one can find her.
A.
aspired
B.
established
C.
entitled
D.
vanished
【单选题】She seems to have______ without trace. No one can find her.
A.
established
B.
aspired
C.
vanished
D.
entitled
【简答题】说出你的理解 理解三个以上 互联网的“IP”。 谈谈和 网络技术的“IP"协议的概念有何区别
【单选题】All her attention is_____________her children and she seems to have no time for anything.
A.
focusing
B.
focused on
C.
focused
D.
focus on
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