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【单选题】
在化学反应Cu+4HNO 3 =Cu（NO 3 ） 2 +2X+2H 2 O中，X的化学式为（ ）A.
N 2 O 5
B.
NO
C.
N 2
D.
NO 2
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举一反三
【单选题】not giving special favor or support to any one side
A.
unfair
B.
impartially
C.
impatient
D.
impossible
【简答题】D After giving a talk at a high school, I was asked to pay a visit to a special student. An illness had kept the boy home, but he had expressed an interest in meeting me, and it would mean a great dea...
【简答题】按产品之间的销售关系划分产品的类型,可将产品划分为( )。
【简答题】After giving a talk at a high school, I was asked to pay a visit to a special student. An illness had kept the boy home, but he had expressed an interest in meeting me. I was told it would mean a grea...
【简答题】A．Talking about the latest fashion. B．Offering special reductions. C．Giving bigger discounts to female customers. D．Pressing on the customer to make a decision.
【简答题】阅读理解。 After giving a talk at a high school, I was asked to pay a visit to a special student. An illness had kept the boy home, but he was interested in meeting me. I was told it would mean a great dea...
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