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【多选题】
中药分析工作的基本程序有( )A.
取样
B.
供试品溶液的制备
C.
鉴别与检查
D.
含量测定
E.
原始记录和检验报告。
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反馈参考答案：
举一反三
【单选题】The regression slope term ( b ) in the simple regression model is
A.
correctly interpreted as the change in X given a unit change in Y
B.
usually known to the investigator
C.
the change in the mean of Y given a unit change in X
D.
undetermined using the ordinary least squares method
【单选题】In calculating the regression equation linking two variables, the standard formulae for the regression coefficients are given in terms of X and Y. Which of the following is true?
A.
X must be the variable which will be forecast
B.
It does not matter which variable is which
C.
Y must be the dependent variable
D.
Y must be the variable shown on the vertical axis of a scatter diagram
【判断题】The coefficient of determination gives the proportion of the variability in the dependent variable that is explained by the regression equation.
A.
正确
B.
错误
【简答题】科技查新的类型有哪些?科技查新的流程有哪些?
【单选题】Changing the unit of measurement of any independent variable, where log of the dependent variable appears in the regression:
A.
affects only the intercept coefficient.
B.
affects only the slope coefficient.
C.
affects both the slope and intercept coefficients.
D.
affects neither the slope nor the intercept coefficient.
【简答题】《殽之战》中,晋文公去世,其子晋襄公“墨衰絰”,穿上黑色的丧服以示哀痛。这体现了古代的哪个礼节?A. 凶礼
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