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【单选题】
相关系数的取值范围为()
A.
(-1,1)
B.
(-1,1]
C.
[-1,1)
D.
[-1,1]
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参考答案:
举一反三
【判断题】方差和标准差都是以均值为中心的、反映部分数据的离散程度的特征值,在多方面都优于极差。
A.
正确
B.
错误
【单选题】听力原文:W:I have been looking through your application.You seem to have many of the qualifications needed for this position.Do you have any work experience? M:Actually,I am scheduled to finish school in ...
A.
He has just quitted his former job.
B.
He is still a school student.
C.
He is applying for a job.
D.
He is having an interview now.
【单选题】听力原文:W: I have been looking through your application. You seem to have many of the qualifications needed for this position, especially experience. M: I have been working in hotels for eight years. W: ...
A.
He is satisfied with it.
B.
Not totally pleased.
C.
It's not hard.
D.
He doesn't like it.
【单选题】与《中药品种保护条例》规定不符的是( )。
A.
相当于国家一级保护野生药材物种的人工制成品,可申请一级保护
B.
对特定疾病有特殊疗效的中药品种获得专利保护后,还可申请中药品种保护
C.
对特定疾病有显著疗效的中药品种,能够获得为期七年的保护,期满后可申请延长保护期限
D.
擅自仿制中药保护品种的,以生产假药依法论处
E.
已经解除一级保护的品种,可以申请二级保护
【单选题】563. ( )是硬件抗干扰措施。
A.
屏蔽技术
B.
接地措施
C.
滤波技术
D.
 以上都是
【单选题】听力原文:W: Edward Allsop, you seem to have had two consuming passions in your life, music and politics. Am I right? M: Yes. I think it's very important that leaders should have a wide variety of interest...
A.
A violinist.
B.
A pianist.
C.
a musician.
D.
a politician.
【单选题】听力原文:W:You seem to have a lot of work at your office.You're, always staying late and working overtime. M:That's true,but it's no matter to me.The work is interesting and fun.I don't mind the extra hou...
A.
He hates his job.
B.
He enjoys his job.
C.
He wants to find another job.
D.
He is indifferent to his job.
【单选题】( )是硬件抗干扰措施
A.
屏蔽技术
B.
接地技术
C.
滤波技术
D.
以上都是
【单选题】You seem to have a ready—made answer _______ I ask you a question.
A.
however
B.
whatever
C.
whichever
D.
whenever
【单选题】向土壤加入一定浓度的钠盐,土壤颗粒会()
A.
更加分散
B.
团聚在一起
C.
没有任何变化
D.
带有更多的电荷
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