颈椎病的最佳牵引重量为体重的()
A.10%~15%
B.10%~20%
C.15%~20%
D.20%~30%
E.15%~30%
参考答案:C
You’d better your score and see if you have passed the exam.
A.add up to
B.add to
C.add up
D.Add
把一个棱长为6分米的正方体铁块锻造成一个底面是12平方分米的长方体,这个长方体的高是多少分米?