迄今，诊断动脉导管未闭的"金标准"是
A．X线平片
B．CT
C．MRI
D．超声心动图
E．心血管造影
参考答案：E
— Would you like to ______ the discussion in our classroom?
— I’d love to, but I’m ______ busy right now.
A．join in; much too
B．join; much too
C．take; far too
D．take part in; too much
关于外墙砖砌体高度计算说法不正确的有( )
A．位于屋架下弦，其高度算至屋架底
B．坡屋面无檐口天棚的算至屋面板底
C．平屋面算至钢筋混凝土板面
D．女儿墙从屋面板上表面算至压顶下表面
