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问题
单项选择题
信用担保机构实收资本必须达到人民币（）元（含）以上方可准入。
A、1千万
B、2千万
C、5千万
D、1亿
答案
参考答案：D
填空题
方程
log
2
(x+b)=
log
2
x
2
-4
有解，则b∈______．
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选择题
How annoying ____!
A. that they are making so much noise
B. is they are making so much noise
C. is it that they are making so much noise
D. it is that they are making so much noise
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