患者,男性,右侧下肢偏瘫,选用轮椅。
轮椅坐位的长度是坐垫的前缘离腘窝()。
A.1.5cm
B.3.5cm
C.4.5cm
D.5.5cm
E.6.5cm
参考答案:E
一个圆锥形沙堆,底面半径是3米,高是0.9米,如果每立方米沙子重2吨,这堆沙子重多少吨?
The cognitive theory of learning as put forward by Ausubel is perhaps best understood by contrasting rote and ______ learning.
A. useful B. practicalC. meaningful D. advanced