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【单选题】
某人给四位亲友各写一封信,然后随机地分别装入4个信封,且每个信封装有一封信,则所有对了的概率是( )A.
1/3
B.
1/6
C.
1/12
D.
1/24
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反馈参考答案：
举一反三
【多选题】有关标准误的描述正确的是:?
A.
标准误是平均数抽样总体的标准差
B.
标准误大小反映样本平均数的抽样误差的大小
C.
标准误大小与原总体的标准差σ成正比,与样本含量n的平方根成反比
D.
只有增大抽样样本含量才能降低样本平均数的抽样误差
【简答题】A couple from Minneapolis decided to go to Florida for a long weekend to warm themselves up during one particularly icy cold winter. They planned to stay at the very same hotel where they spent their ...
【单选题】They letting him go and would like him to stay on after his present contract expires. prefix="o" ns="urn:schemas-microsoft-com:office:office" ?xml:namespace>
A.
had no intention in
B.
had no intention of
C.
had no intention with
D.
had no intention at prefix="o" ns="urn:schemas-microsoft-com:office:office" ?xml:namespace>
【单选题】They would not allow him _____ across the enemy line. prefix="o" ns="urn:schemas-microsoft-com:office:office" ?xml:namespace>
A.
to risk going
B.
risking to go
C.
for risk to go
D.
risk going
【简答题】Twenty years ago, I was told a story of Little Brother at a party which has delighted and inspired me ever since. Little Brother, who was an ambitious painter and trying to be an artist, went to Franc...
【单选题】关于肿瘤分级的描述不正确的是
A.
恶性肿瘤的分级是描述其恶性程度的指标
B.
肿瘤的组织学级别越高，恶性度越低
C.
肿瘤的分级是制订治疗方案和估计预后的重要指标之一
D.
高分化肿瘤一般不发生转移
E.
肿瘤分级的主要依据：肿瘤的分化程度、异型性和核分裂象的数目
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