Methods Twenty cases of youth group and 20 cases of early youth group received cardiopulmonary exercise testing.

方法选择健康青年组20名，健康少年组2 0名，进行心肺运动试验。

youdao

Methods Twenty cases of youth group and 20 cases of early youth group received cardiopulmonary exercise testing.

方法选择健康青年组20名，健康少年组2 0名，进行心肺运动试验。

youdao