A-A+
A．Because she has more voluntary muscles than
问题详情
A．Because she has more voluntary muscles than an average man.
B．Because 30 to 40 percent less muscle for her body mass than a man.
C．Because 60 to 70 percent less muscle for her body mass.
D．Because less muscle fiber for her body weight.
参考答案
正确答案：B
解析：选项和原因有关。从Women have only 60 to 70 percent as much muscle as men for their body mass．可以推算出结果，得知B符合题意。
