下列哪些是血吸虫病的并发症（）
A.上消化道出血
B.阑尾炎
C.肝昏迷
D.不完全性肠梗阻
E.肾功能衰竭
参考答案：A, C, D
Many workers were organized to clear away ________ remained of the World Trade Center.
A．those
B．that
C．what
D．where
有一个实心球形物体，用弹簧测力计在空气中称重时，测力计的示数为12N；当把物体一半体积浸入水中时，测力计的示数为5N。把物体从弹簧测力计上取下投入水中静止时，物体受到的浮力是
A．5 N
B．7 N
C．14 N
D．12N
