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【单选题】
组成动态数列的两个基本要素是A.
时间和指标数值
B.
变量和次数（频数）
C.
主词和宾词
D.
水平指标和速度指标
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反馈参考答案：
举一反三
【单选题】This text is mainly about__________． 查看材料
A.
the scientific leadership of the U．S．
B.
the shortage of scientists in the U．S．
C.
the rapid globalization of science
D.
better communication and globalization
【单选题】The accuracy of scientific observation and calculations is always at the mercy of the scientist's timekeeping methods.
A.
under the control of
B.
within the kindness of
C.
beyond the reach of
D.
out of the control of
【单选题】When a science is becoming more advanced,
A.
there will be clearer difference among the sciences of various countries.
B.
there will be more scientists compete with each other.
C.
people will increasingly believe in science.
D.
more people will agree on its basic concepts.
【单选题】Which of the following is an example of telecommuting as described in the passage?
A.
A scientist in a laboratory developing plans for a space station.
B.
A technical writer sending via computer documents created at home.
C.
A computer technician repairing an office computer network.
D.
A teacher directing computer to assist learning in a private school.
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