题目
6. What is the usual walking speed for healthy individuals?A. 1.1m/s or above.B. 4m/s.C. Less than 0.6m/s.D. 0.6m/s.
6. What is the usual walking speed for healthy individuals?
A. 1.1m/s or above.
B. 4m/s.
C. Less than 0.6m/s.
D. 0.6m/s.
题目解答
答案
A. 1.1m/s or above.