【多选题】She stood motionless at the end of the diving board , her hands at her sides, her heels slightly raised,every muscle anticipating action. 对该句中独立结构的理解正确的有:
【单选题】After 50 years of paying for roads, power and schools, and helping poor countries to liberalize their economies, the World Bank—the financial aim of the United Nations system—has started shifting some...
A.
focuses on basic science rather than theoretical one
B.
seems reluctant to aid some of theoretical sciences
【多选题】A regression equation Y = a + bX is used to forecast the value of Y for a given value of X. Which of the following increase the reliability of the forecast?
A.
A correlation coefficient numerically close to 1
B.
Working to a higher number of decimal places of accuracy
C.
Forecasting for values of X outside the range of those used in the sample
D.
A large sample is used to calculate the regression equation