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【单选题】
元素的原子的价电子层构型为4d 10 5s 1 ,它在周期表中的位置为( )。A.
五周期，ds区IB族
B.
五周期，s区IA族
C.
四周期，s区IB族
D.
五周期，ds区IA族
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A.
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B.
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C.
商业信用限制条件高
D.
不带息票据筹资成本高
E.
时间短，还款不及时时会损失信誉，有一定风险
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A.
The island of Guam:
B.
Yokoi Shoichi's marriage.
C.
The battles on Guam during World War Ⅱ
D.
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【单选题】What does the survey indicate?
A.
Many poor Americans want large portions．
B.
Twenty percent Americans want smaller portions．
C.
Fifty seven percent Americans earn $150，000 per year．
D.
Twenty three percent Americans earn less than$25，000 per year．
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