PTCD术的并发症是()
A．胆汁漏
B．脾栓塞
C．肠梗阻
D．胆囊栓塞
E．以上都不是
参考答案：A
在海边观察远处驶来的轮船，会出现下图中①—③所示的现象，这种现象反映了（ ）
A．地球自西向东自转
B．地球是个球体
C．地球绕太阳公转
D．海平面上升
The number of people invited __________ fifty, but a number of them __________ absent for different reasons
A．were ; was
B．was ; was
C．was ; were
D．were ; were
