超声心动图的检查需要通过声窗进行，常规的声窗中不包括：
A．心前区 B．心底部C．胸骨旁 D．剑突下
参考答案：B
下列电离方程式书写正确的是 （ ）
A．HClO H+ + ClO
B．H2SO2H+ + SO
C．Ba(OH)2 ="===" Ba+2O+2H
D．NaHCO====Na+H+CO
Only teachers are permitted to enter the reading room, that is to say, the reading room is only________ to teachers.
A．abundant
B．aware
C．accessible
D．absurd
H+ + ClO
+2O
+2H