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【单选题】
下列过程中人对桶做功的是A.
提着捅站立不动
B.
提若桶水平移动
C.
提着桶站在匀速向上运动的电梯内
D.
提着桶站在匀速水平运动的车厢内
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反馈参考答案：
举一反三
【单选题】If we use the Empirical Rule sales will be between what two values on 68% of the days?
A.
87.23 and 96.57
B.
84.23 and 99.57
C.
80.23 and 103.57
D.
85.23 and 98.57
【单选题】The Empirical Rule states that:
A.
for a bell shaped frequency distribution, approximately 68% of the observations are in the range of plus or minus one standard deviation.
B.
for a positively skewed frequency distribution, approximately 68% of the observations are in the range of plus or minus one standard deviation.
C.
for a bell shaped frequency distribution, approximately 75% of the observations are in the range of plus or minus one standard deviation.
D.
for a positively skewed frequency distribution, approximately 75% of the observations are in the range of plus or minus one standard deviation.
【单选题】在船舶保安活动内部审核中，通常通过面试检查船员是否熟悉本船舶保安计划中规定的本人应承担的保安职责，其中船长和船舶保安员为必查，其他船员可通过抽查方式进行，抽查范围不少于在船人员总数的____，且其中必须包含至少____名应急小组成员
A.
25%
B.
20%
C.
35%
【单选题】The Empirical Rule states that:
A.
for a bell shaped frequency distribution, approximately 68% of the observations are in the range of plus or minus one standard deviation.
B.
for a positively skewed frequency distribution, approximately 75% of the observations are in the range of plus or minus one standard deviation.
C.
for a bell shaped frequency distribution, approximately 75% of the observations are in the range of plus or minus one standard deviation.
D.
for a positively skewed frequency distribution, approximately 68% of the observations are in the range of plus or minus one standard deviation.
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