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【简答题】
出口合同履行中的三平衡是指__________、_____________、__________的平衡。
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反馈参考答案：
举一反三
【单选题】Not having finished his homework, ______ to watch TV.
A.
Mother forbade him
B.
so he was forbidden
C.
and he wanted
D.
he was forbidden
【单选题】锰和镍（Ni）都是金属元素，将镍丝插入MnSO 4 溶液中无变化，插入CuSO 4 溶液中，镍丝上有红色固体析出．Mn、Ni、Cu三种金属的活动性由弱到强的顺序是（ ）
A.
Mn、Ni、Cu
B.
Ni、Cu、Mn
C.
Cu、Ni、Mn
D.
Mn、Cu、Ni
【单选题】_____ he has tried his best, I don’t mind his not having finished the task on time
A.
As soon as
B.
As well as
C.
So far as
D.
So long as
【单选题】锰（Mn）、镍（Ni）都是金属，将镍丝插入硫酸锰溶液中，无变化；将镍丝插入硫酸铜溶液中，镍丝上有铜析出．则的金属活动性由弱到强排列正确的是（ ）
A.
Mn Cu Ni
B.
Ni Mn Cu
C.
Cu Ni Mn
D.
Mn Ni Cu
【简答题】交易文件的完整性得以保证是因为应用了
【单选题】Not having finished his homework,_____ to watch TV.
A.
mother forbade him
B.
so he was forbidden
C.
and he wanted
D.
he was forbidden
【单选题】____, they were forbidden to leave the company. [ ]
A.
Not having finished their jobs
B.
Having not finished their jobs
C.
Not finishing their jobs
D.
Not finished their jobs
【单选题】锰和镍（Ni）都是金属元素，将镍丝插入MnSO 4 溶液中无变化，插入CuSO 4 溶液中，镍丝上有红色固体析出。Mn、Ni、Cu三种金属的活动性由强到弱的顺序是 [ ]
A.
Cu、Mn、Ni
B.
Mn、Ni、Cu
C.
Ni、Cu、Mn
D.
Mn、Cu 、Ni
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