防洪(防浪)墙的常用结构不包括()。
A.浆砌石
B.混凝土
C.钢筋混凝土
D.散抛堆石
参考答案:D
下列哪些检查指标显示患者左心室功能不全()
A.LVEF35%
B.PCWP2.53kPa(19mmHg)
C.CI2.46L/(min·m)
D.CO4.6L/min
_____ a special on computers this week.[ ]
A. There is
B. There are
C. Have
D. There has