[单项选择]

对于不满足参数检验条件的多组独立样本连续型变量资料，假设检验时宜采用（）
 

A. χ²检验
B. Wilcoxon符号秩检验
C. Wilcoxon秩和检验
D. Kruskal-Wallis检验
E. F检验

本文以                                比照，主要从                                和知识两个方面对常识教育加以辨析阐释。（4分）

                                                                              Solar Storm
At the end of October 2003, a sudden solar storm hit the earth. A solar storm refers to the large amounts of charged particles released into space (1) the solar energy increases. The release of the energy (2) place along with the activity of the sunspots with a cycle of 11 years. This time, the (3) of the storm exceeded expectations.
This (4) of intense solar storm was caused by the eruption of a solar flare (闪光) and the ejection (喷发) of the sola
A. limit
B. cause
C. force
D. threat