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【单选题】
连续生产的电子管厂，产品质量检验是这样安排的，在一天中，每隔一小时抽取5分钟的产品进行检验，这是（）A.
简单随机抽样
B.
整群抽样
C.
等距抽样
D.
类型抽样
手机使用
分享
复制链接
新浪微博
分享QQ
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反馈参考答案：
举一反三
【单选题】下列说法关于专制主义中央集权制表述不正确的有（）
A.
是中国封建社会基本的政治制度
B.
它确立于秦朝，汉至元不断发展，明清强化。
C.
其核心是皇权至上，它贯穿君权与相权、中央与地方两对基本矛盾
D.
明清时期治理国家积极作用明显大于消极作用，它使中国更加富强
【简答题】补全对话 it’s, too, how, goodbye, and , thank, hello, what, you, in Peter: Hello！ Amy: 1 ! Peter: I’m Peter. 2 is your name? Amy: I’m Amy. Peter: Nice to meet you. Amy: Nice to meet you, 3 . Peter: 4 are ...
【单选题】—Look！Here comes the bus and I have to go now. Thank you for coming to see me off. —Goodbye，and______！
A.
congratulations
B.
all the best
C.
cheer up
D.
go ahead
【简答题】A: Hello, Mr. Tan. How are you? B: Oh, fine, thank you. 11 And how are you and your parents? A: We're all very well, too. Thank you. B: 12 A: My parents and I are going to see my aunt in Beijing, 13 B...
【简答题】补全对话。 A. She's wearing a red coat, brown trousers and black shoes. B. Thank you. Goodbye. C. She likes singing and drawing. Her favorite sports is swimming. D. She's six. E. She's got blue eyes and lo...
【单选题】What will the woman probably do next?
A.
Say goodbye and hang up
B.
Collect the man's garbage
C.
Explain about a new service
D.
Thank the man's assistance
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