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问题
问答题 简答题
当用到何种金属的操作时,决不能在水浴上进行?
答案
参考答案:
K或Na
选择题
He often speaks the role he played in the play, ______ made others upset.
A. which
B. that
C. where
D. when
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问答题 简答题
滚筒上缠绕2层或2层以上钢丝绳时,必须符合哪些要求?
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