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【简答题】
The two main factors that influence the language learning are the role of natural ability and the role of ______________
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反馈参考答案：
举一反三
【简答题】防止水泥石腐蚀的措施有哪些?
【简答题】水泥石腐蚀的防止措施有哪些?
【单选题】听力原文：W: I don't have time to take the medical report to the family doctor for having an urgent meeting this morning. Could you take it to him for me? M: Er... I'm afraid I've too much to do. Q: What d...
A.
He's not sure if he could take the report for her.
B.
He is too busy to take the report for her.
C.
He always helps her no matter whether he's busy or not.
D.
He could take the report for her later that day.
【简答题】水泥石腐蚀是原因是什么？防止水泥石腐蚀的措施有哪些？
【简答题】(13分)工业上生产高氯酸时，还同时生产了一种常见的重要含氯消毒剂和漂白剂 亚氯酸钠(NaClO2)，其工艺流程如下： 已知： 1.NaHSO4溶解度随温度的升高而增大，适当条件下可结晶析出。 2.高氯酸是至今为止人们已知酸中的最强酸，沸点90℃。 请回答下列问题 (1)反应器Ⅰ中发生反应的化学方程式为____，冷却的目的是____，能用蒸馏法分离出高氯酸的原因是____。 (2)反应器Ⅱ中发生反...
【单选题】The family having a party to celebrate their .
A.
is; union
B.
are; union
C.
is; together
D.
are; reunion
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