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【单选题】
各种抽样方法的抽样误差一般是（ ）。
A.
单纯随机抽样≥整群抽样≥系统抽样≥分层抽样
B.
整群抽样≥系统抽样≥单纯随机抽样≥分层抽样
C.
整群抽样≥单纯随机样≥系统抽样≥分层抽样
D.
分层抽样≥单纯随机样≥系统抽样≥整群抽样
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举一反三
【单选题】听力原文：W：You look great since you've been taking the Yoga exercise. M: Thanks! I've never felt better in my life. Q: What does the man imply? (16)
A.
He has never felt good in his life.
B.
The Yoga has improved his health.
C.
He is unhappy about his life.
D.
He is thinking of taking a Yoga exercise.
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【单选题】– I’ve been trying to call you since Sunday night, but there was no answer. – _______________.
A.
My phone was out of order. I didn’t realize it until this morning. 
B.
Did anybody come to visit you over the summer?
C.
Where have you been working since you quit your job at the bank?
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【判断题】A 、 B 两组分液体混合物,用蒸馏的方法加以分离,是因为 B 的沸点低于 A 的沸点,造成挥发度的差异。
A.
正确
B.
错误
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【简答题】You’ve just come home, after living abroad for a few years. Since you’ve been away, has this country changed for the better or for the worse? If you’ve just arrived back in the UK after a fortnight’s ...
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【简答题】阅读理解。 You've just come home, after living abroad for a few years. Since you've been away, has this country changed for the better-or for the worse? If you've just arrived back in the UK after a fortni...
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【判断题】有人说：A、B两组分液体混合物，用蒸馏方法加以分离，是因为A沸点低 于B沸点，所以造成挥发度差异。这句话对还是错？
A.
正确
B.
错误
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【单选题】— ____ have you been at this factory? — I've been here since 1993. [     ]
A.
When
B.
How long
C.
What time
D.
How often
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【多选题】多功能智能点灯单元测试的主要技术指标相同，但用途不同的有（）。
A.
DZD-BT
B.
DZD-PD
C.
DZD-CT
D.
DZD-L
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【单选题】—John, you've never been to the Great Wall since you came to China, I'm afraid.—______
A.
No, I've just been there with Mary.
B.
Yes, never. How about you?
C.
No, but how I wish to!
D.
Yes, but I'd like to as soon as possible.
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【单选题】听力原文：M: Hi, I've been looking for you since the morning. Where have you been? W: Yeah, I don't feel like hanging out with the crowd any more, especially since Jane stopped coming to school. M: It's su...
A.
How to get a part-time job.
B.
A terrible accident on campus.
C.
How to help a classmate.
D.
Independence of college students.
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相关题目：
【单选题】听力原文：W：You look great since you've been taking the Yoga exercise. M: Thanks! I've never felt better in my life. Q: What does the man imply? (16)
A.
He has never felt good in his life.
B.
The Yoga has improved his health.
C.
He is unhappy about his life.
D.
He is thinking of taking a Yoga exercise.
查看完整题目与答案
【单选题】– I’ve been trying to call you since Sunday night, but there was no answer. – _______________.
A.
My phone was out of order. I didn’t realize it until this morning. 
B.
Did anybody come to visit you over the summer?
C.
Where have you been working since you quit your job at the bank?
查看完整题目与答案
【判断题】A 、 B 两组分液体混合物,用蒸馏的方法加以分离,是因为 B 的沸点低于 A 的沸点,造成挥发度的差异。
A.
正确
B.
错误
查看完整题目与答案
【简答题】You’ve just come home, after living abroad for a few years. Since you’ve been away, has this country changed for the better or for the worse? If you’ve just arrived back in the UK after a fortnight’s ...
查看完整题目与答案
【简答题】阅读理解。 You've just come home, after living abroad for a few years. Since you've been away, has this country changed for the better-or for the worse? If you've just arrived back in the UK after a fortni...
查看完整题目与答案
【判断题】有人说：A、B两组分液体混合物，用蒸馏方法加以分离，是因为A沸点低 于B沸点，所以造成挥发度差异。这句话对还是错？
A.
正确
B.
错误
查看完整题目与答案
【单选题】— ____ have you been at this factory? — I've been here since 1993. [     ]
A.
When
B.
How long
C.
What time
D.
How often
查看完整题目与答案
【多选题】多功能智能点灯单元测试的主要技术指标相同，但用途不同的有（）。
A.
DZD-BT
B.
DZD-PD
C.
DZD-CT
D.
DZD-L
查看完整题目与答案
【单选题】—John, you've never been to the Great Wall since you came to China, I'm afraid.—______
A.
No, I've just been there with Mary.
B.
Yes, never. How about you?
C.
No, but how I wish to!
D.
Yes, but I'd like to as soon as possible.
查看完整题目与答案
【单选题】听力原文：M: Hi, I've been looking for you since the morning. Where have you been? W: Yeah, I don't feel like hanging out with the crowd any more, especially since Jane stopped coming to school. M: It's su...
A.
How to get a part-time job.
B.
A terrible accident on campus.
C.
How to help a classmate.
D.
Independence of college students.
查看完整题目与答案