元气运行之通道是指______
A．胆 B．胃C．大肠 D．小肠E．三焦
参考答案：E
— Look! How tall the tree is!
— Yes. It ______ nearly 20 metres. [ ]
A. measures
B. is measured
C. is measuring
D. measured
统计量是样本的函数。
