A.25~35B.35~45C.45~55D.25~75
A.10~12B.12~14C.14~16D.16~18
A.收缩压=月龄x2+68mmHgB.收缩压=月龄x2+78mmHgC.收缩压=月龄x2+88mmHgD.收缩压=月龄x2+98mmHg