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【简答题】
c____ n. [C] sb. whose job is to make things from wood or repair things that aremade of wood 木匠;木工
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【简答题】阅读理解: I really love volunteering,for example, volunteering at old people's homes. It's one of my favorite________1. At my old school, I often helped my classmates. It was fun to_________2 their studie...
【简答题】已知在1mol?L-1HCl中，ψθFe3+／Fe2+＝0．68V，ψθSn4+／sn2+＝0．14V，则以Fe3+滴定Sn2+至99．9 ％时的平衡电位为__________；计量点电位为__________；滴定至 l00．1 ％时的平衡电位为____________；计量点前后电位改变不对称是由于____________。
【简答题】完形填空。 It Seemed Like a Good Idea at the Time I really only meant it as a joke. I wasn't trying to steal anything honestly. My friend Matthew started bringing his new cell phone to class last week. He ...
【单选题】已知: (Sn 4+ / Sn 2+ ) = 0.14 V, (Fe 3+ / Fe 2+ ) = 0.77 V,则不能共存于同一溶液中的一对离子是
A.
Sn 4+ ， Fe 2+
B.
Fe 3+ ， Fe 2+
C.
Fe 3+ ， Fe 2+
D.
Sn 4+ ， Sn 2+
【简答题】已知在1mol/L HCl介质中，已知φӨ′Fe3+/Fe2+=0.68V；φӨ′Sn4+/Sn2+=0.14V，则下列滴定反应：2Fe3+ + Sn2+ = 2Fe2+ + Sn4+到达化学计量点时的电位为___V。
【简答题】已知在1mol/L HCl介质中φӨ′Fe3+/Fe2+=0.68V；φӨ′Sn4+/Sn2+=0.14V，则下列滴定反应：2Fe3+ + Sn2+ = 2Fe2+ + Sn4+，化学计量点电位为___V。
【简答题】短文改错 I've really got to do something to lose weight because I'm getting much too fat. I wasn't worried about it until I go 1._________ to see the doctor. He told me that I'd probably had a heart 2.___...
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