属于继发性腹膜炎的病因是
A．急性胆囊炎
B．绞窄性肠梗阻
C．胰腺炎
D．髂窝脓肿
E．急性阑尾炎
参考答案：A,B,C,E
We all feel it is Jack as well as his wife that for their son's bad performance at school.
A．are to blame
B．is to the blamed
C．are to be blamed
D．is to blame
装车时道外撒土高度不得超过（）米。
A.0.3
B.0.5
C.0.8
