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【判断题】
独立源都是发出功率的。
A.
正确
B.
错误
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【简答题】According to the passage, why does the cancer increase? [A] Because people expose too much to the computer. [B] Because people don't care about the low levels of radiation. [C] Because the cells are k...
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【单选题】According to the text, why does the same deafness afflict the same people?
A.
Because governments all turned their attention to these people.
B.
Because these people are more likely to have unhealthy behaviors.
C.
Because these people suffer more from their poor income and education.
D.
Because governments always neglect the real needs of these people.
查看完整题目与答案
【多选题】在组距式频数分布数列中,组距的大小
A.
同总体单位数的多少成正比
B.
同组数的多少成正比
C.
同组数的多少成反比
D.
同全距的大小成正比
E.
同全距的大小成反比
查看完整题目与答案
【多选题】在组距式频数分布数列中,其种类有
A.
闭口式的
B.
开口式的
C.
等距式的
D.
不等距式的
E.
有组限的
查看完整题目与答案
【多选题】在频数分布数列中( )
A.
总频数一定，频数和频率成反比
B.
各组的频数之和等于100
C.
各组频率大于零，频率之和等于1
D.
频率越小，各组的标志值所起的作用越小
E.
频率表明各组标志值对总体的相对作用程度
查看完整题目与答案
【单选题】Why does the author say that Swiss people may not be able to tell the name of their president?
A.
Because Swiss people are indifferent to politics.
B.
Because Swiss people are inaccessible to political information.
C.
Because the election of Swiss president has nothing to do with the Swiss.
D.
Because president of Switzerland is not directly elected by the Swiss.
查看完整题目与答案
【单选题】Why does it take long for people to change their food?
A.
Because labs are not easily accessible to researchers.
B.
Because some people are reluctant to accept the new diet.
C.
Because food consumption is a culture of conservation.
D.
Because some scientists are against the growing lab meat.
查看完整题目与答案
【单选题】下列有关频数分布表和频数分布直方图的理解，正确的是（　　）
A.
频数分布表能清楚地反映事物的变化情况
B.
频数分布直方图能清楚地反映事物的变化情况
C.
频数分布直方图能清楚地表示出各部分在总体中所占的百分比
D.
二者均不能清楚地反映变化情况和在总体中所占的百分比，但能反映出每个项目的具体数目
查看完整题目与答案
【单选题】Why does the professor recommend that students pay attention to the people they see every day?
A.
The behavior. and characteristics of these people can be used in character sketches.
B.
Observing people in real-life situations can provide ideas for story plots.
C.
It is easier to observe the behavior. of familiar people than of new people.
D.
Students can gather accurate physical descriptions for their characters.
查看完整题目与答案
【多选题】在频数分布数列中( )。
A.
总次数一定,频数和频率成反比
B.
各组的频数之和等于100
C.
各组频率大于0,频率之和等于1
D.
频率越小,则该组数值所起作用越小
E.
频率表明各组变量值对总体的相对作用程度
查看完整题目与答案
相关题目：
【简答题】According to the passage, why does the cancer increase? [A] Because people expose too much to the computer. [B] Because people don't care about the low levels of radiation. [C] Because the cells are k...
查看完整题目与答案
【单选题】According to the text, why does the same deafness afflict the same people?
A.
Because governments all turned their attention to these people.
B.
Because these people are more likely to have unhealthy behaviors.
C.
Because these people suffer more from their poor income and education.
D.
Because governments always neglect the real needs of these people.
查看完整题目与答案
【多选题】在组距式频数分布数列中,组距的大小
A.
同总体单位数的多少成正比
B.
同组数的多少成正比
C.
同组数的多少成反比
D.
同全距的大小成正比
E.
同全距的大小成反比
查看完整题目与答案
【多选题】在组距式频数分布数列中,其种类有
A.
闭口式的
B.
开口式的
C.
等距式的
D.
不等距式的
E.
有组限的
查看完整题目与答案
【多选题】在频数分布数列中( )
A.
总频数一定，频数和频率成反比
B.
各组的频数之和等于100
C.
各组频率大于零，频率之和等于1
D.
频率越小，各组的标志值所起的作用越小
E.
频率表明各组标志值对总体的相对作用程度
查看完整题目与答案
【单选题】Why does the author say that Swiss people may not be able to tell the name of their president?
A.
Because Swiss people are indifferent to politics.
B.
Because Swiss people are inaccessible to political information.
C.
Because the election of Swiss president has nothing to do with the Swiss.
D.
Because president of Switzerland is not directly elected by the Swiss.
查看完整题目与答案
【单选题】Why does it take long for people to change their food?
A.
Because labs are not easily accessible to researchers.
B.
Because some people are reluctant to accept the new diet.
C.
Because food consumption is a culture of conservation.
D.
Because some scientists are against the growing lab meat.
查看完整题目与答案
【单选题】下列有关频数分布表和频数分布直方图的理解，正确的是（　　）
A.
频数分布表能清楚地反映事物的变化情况
B.
频数分布直方图能清楚地反映事物的变化情况
C.
频数分布直方图能清楚地表示出各部分在总体中所占的百分比
D.
二者均不能清楚地反映变化情况和在总体中所占的百分比，但能反映出每个项目的具体数目
查看完整题目与答案
【单选题】Why does the professor recommend that students pay attention to the people they see every day?
A.
The behavior. and characteristics of these people can be used in character sketches.
B.
Observing people in real-life situations can provide ideas for story plots.
C.
It is easier to observe the behavior. of familiar people than of new people.
D.
Students can gather accurate physical descriptions for their characters.
查看完整题目与答案
【多选题】在频数分布数列中( )。
A.
总次数一定,频数和频率成反比
B.
各组的频数之和等于100
C.
各组频率大于0,频率之和等于1
D.
频率越小,则该组数值所起作用越小
E.
频率表明各组变量值对总体的相对作用程度
查看完整题目与答案