肺顺应性是（）
A.顺应人工呼吸的能力
B.单位压力作用下引起的肺容量改变
C.对呼吸肌做功大小的适应性
D.对抗人工呼吸的能力
E.上述全部
参考答案：B
对于配对设计的两分类变量资料，进行假设检验应选用（）
A．X2检验
B．Wilcoxon符号秩和检验
C．Wilcoxon秩和检验
D．Kruskal-Wallis检验
E．F检验
To help others is more valuable than anything else. ______ we show our love and care to others,
the world will be full of happiness and pleasure. [ ]
A. As long as
B. As many as
C. As tall as
