长方体的体积=底面积×高______．
因为长方体的体积=长×宽×高，而长×宽=底面积，
所以长方体的体积=底面积×高，原题说法正确．
故答案为：正确．
In China today women ___ 40% of the workforce, and nearly half of the others with children are in paid work.
A．build up
B．hold on
C．make up
D．stand for
快速进展性牙周炎的特征性变化是
A．早期出现牙齿松动和移位
B．病变早期口腔卫生情况较好
C．病程进展快
D．牙周破坏程度与年龄不相称
E．以上均是
