具有同时阻断β1和β2受体的药物是 A．普萘洛尔 B．去甲肾上腺素 C．异

心脏三维超声成像方式的主要检查声窗是（选择二项）

A、经食管 

B、经腹壁 

C、经主动脉 

D、经胸壁 

E、经下腔静脉 

男性，20岁，1个月来心悸、多汗，检查心脏不大，心率110次／分，律齐，无杂音，此患者心率快最可能是由于（）.

A.窦性心动过速

B.室上性心动过速

C.室性心动过速

D.心房扑动

E.心房颤动

Cost performance measurement is BEST done through which of the following ？（）

A．Asking for a percent complete from each team member and reporting that in the monthly progress report

B．Calculating earned value and using the indexes and other calculations to report past performance and forecast future performance

C．Using the 50/50 rule and making sure the life cycle cost is less than the project cost

D．Focusing on the amount expended last month and what will be expended the following month

武汉海关依照湖北省政府颁发的法规进行执法。

用（）命令查询图形的信息包括图形所在图层、对象的类型及面积等信息。