有助于确定有无心包积液最简单、易行、可靠的方法是()
A.心电图检查
B.X线胸片
C.心包活检
D.超声心动图
E.血液动力学监测
参考答案:D
The most striking technological success in the 20th century is probably the computer revolution.
A.profitable
B.productive
C.prominent
D.prompt
羊水吸收途径约占50%的是
A.胎儿吞咽 B.胎儿皮肤角化前C.胎膜吸收 D.脐带吸收E.胎盘吸收