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【单选题】
有关物质及其用途的描述，正确的是 ①Al 2 O 3 （作耐火坩埚）         ②KAl(SO 4 ) 2 ·12H 2 O（作水的消毒剂） ③Fe 2 O 3 （作黄色油漆和涂料）    ④Na 2 CO 3 （作食用碱） ⑤钠、钾、锶、钡等化合物（作烟花的焰色） ⑥Na 2 O 2 （作呼吸面具供氧剂）
A.
①④⑤⑥
B.
①②⑤⑥
C.
①③④⑤
D.
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【单选题】When drawing multilevel data flow chart of top-down,the balance between parent chart and son chart must be taken into account,and to pass judgment for the balance of the charts is regularly maintained...
A.
output data
B.
data dictionary
C.
processing number
D.
input data
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【单选题】测定铁矿中铁的含量,4次结果的平均值为56.28%,标准偏差为0.10%。置信度为95%时总体平均值的置信区间(%)是(已知t0.05,3=3.18。)
A.
56.28±0.138
B.
56.28±0.14
C.
56.28±0.159
D.
56.28±0.16
查看完整题目与答案
【简答题】测定铁矿中铁的含量，4次结果的平均值为56.28%，标准偏差为0.10%。置信度为95%时总体平均值的置信区间(%)是(已知t 0.05,3 =3.18。)(    ) (A) 56.28+0.138.    (B) 56.28±0.14。 (C) 56.28±0.159。   (D) 56.28+0.16。
查看完整题目与答案
【单选题】社会安全是指人民大众的生命、健康和财产安全。( )
A.
是
B.
否
查看完整题目与答案
【判断题】社会安全是指人民大众的生命、健康和财产安全。
A.
正确
B.
错误
查看完整题目与答案
【单选题】Surveys reveal that most adults consider themselves "well informed about the affairs of the nation and the world." Yet a regularly taken Roper poll that asks, "From where do you obtain most of your in...
A.
Most adults obtain most of their information about world affairs from the newspaper.
B.
The author of this passage does not believe that television provides enough information to make people well informed.
C.
The number of people answering the questionnaire has increased.
D.
Sixty percent of the people questioned get all their news from television.
E.
Most adults are well informed about the affairs of the nation and the world.
查看完整题目与答案
【简答题】当使用指针指向一个函数时,这个指针就称做________.
查看完整题目与答案
【简答题】请阅读该段落,然后在该段落中找到符合给定定义的术语。 A 75-year-old man was admitted with suspected pneumothorax due to an auto accident. He was hyperventilating and cyanotic. The patient was breathing regularly, he was taken t...
查看完整题目与答案
【单选题】It has been found that vitamin E______.
A.
should be taken by patients regularly and persistently
B.
can effectively reduce the recurrence of heart disease
C.
has a preventive but not curative effect on heart disease
D.
should be given to patients with heart disease as early as possible
查看完整题目与答案
【单选题】中国人民解放军在同国民党军队进行战略决战时,最先进行的是
A.
淮海战役
B.
辽沈战役
C.
平津战役
D.
济南战役
查看完整题目与答案
相关题目：
【单选题】When drawing multilevel data flow chart of top-down,the balance between parent chart and son chart must be taken into account,and to pass judgment for the balance of the charts is regularly maintained...
A.
output data
B.
data dictionary
C.
processing number
D.
input data
查看完整题目与答案
【单选题】测定铁矿中铁的含量,4次结果的平均值为56.28%,标准偏差为0.10%。置信度为95%时总体平均值的置信区间(%)是(已知t0.05,3=3.18。)
A.
56.28±0.138
B.
56.28±0.14
C.
56.28±0.159
D.
56.28±0.16
查看完整题目与答案
【简答题】测定铁矿中铁的含量，4次结果的平均值为56.28%，标准偏差为0.10%。置信度为95%时总体平均值的置信区间(%)是(已知t 0.05,3 =3.18。)(    ) (A) 56.28+0.138.    (B) 56.28±0.14。 (C) 56.28±0.159。   (D) 56.28+0.16。
查看完整题目与答案
【单选题】社会安全是指人民大众的生命、健康和财产安全。( )
A.
是
B.
否
查看完整题目与答案
【判断题】社会安全是指人民大众的生命、健康和财产安全。
A.
正确
B.
错误
查看完整题目与答案
【单选题】Surveys reveal that most adults consider themselves "well informed about the affairs of the nation and the world." Yet a regularly taken Roper poll that asks, "From where do you obtain most of your in...
A.
Most adults obtain most of their information about world affairs from the newspaper.
B.
The author of this passage does not believe that television provides enough information to make people well informed.
C.
The number of people answering the questionnaire has increased.
D.
Sixty percent of the people questioned get all their news from television.
E.
Most adults are well informed about the affairs of the nation and the world.
查看完整题目与答案
【简答题】当使用指针指向一个函数时,这个指针就称做________.
查看完整题目与答案
【简答题】请阅读该段落,然后在该段落中找到符合给定定义的术语。 A 75-year-old man was admitted with suspected pneumothorax due to an auto accident. He was hyperventilating and cyanotic. The patient was breathing regularly, he was taken t...
查看完整题目与答案
【单选题】It has been found that vitamin E______.
A.
should be taken by patients regularly and persistently
B.
can effectively reduce the recurrence of heart disease
C.
has a preventive but not curative effect on heart disease
D.
should be given to patients with heart disease as early as possible
查看完整题目与答案
【单选题】中国人民解放军在同国民党军队进行战略决战时,最先进行的是
A.
淮海战役
B.
辽沈战役
C.
平津战役
D.
济南战役
查看完整题目与答案