心尖朝向____方，其体表投影在左侧第____肋间隙，左锁骨中线____处。
参考答案：左前下；5；内1～2cm
269. Although he didn't mention any names, everyone knew _____ he was _______.
A．who … referring to
B．that … referring to
C．who … refers to
D．that … referred to
肿疡基底部周同之坚硬区，称为( )
A．创面B．疽C．根盘D．根脚E．护场
