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【单选题】
在酸性溶液中 Fe 易腐蚀是因为 ( )A.
Fe 2+ /Fe 的标准电极电势下降
B.
Fe 3+ /Fe 2+ 的标准电极电势上升
C.
E H + /H2 的值因〔 H + 〕增大而上升
D.
E H + /H2 的值下降
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举一反三
【简答题】3D 打印技术在传统文化保护上的应用有哪些? 用于文物修复的3D打印工艺有哪些?
【单选题】When he woke up,he found his watch gone.It seemed that he suspected me it.
A.
to steal
B.
steal
C.
of stealing
D.
stealing
【单选题】He went to bad , and then he woke up and found he still had his shoes on. [ ]
A.
drinking
B.
to drink
C.
drunk
D.
being drunk
【简答题】酸性矿石的酸碱度小于 ,碱性矿石的酸碱度大于 。
【简答题】Paul couldn’t sleep last night. He woke up early and sat up, and then he lay down again. He felt terrible. “I must be sick,” he thought. “but I must study for that test.” He got up and looked for his ...
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