下面程序段执行结果为
x=Int(Rnd()+4)
Select Case x
Case 5
Print"excellent"
Case 4
Print"good"
Case 3
Print "pass"
Case Else
Print "fail"
End Select

A．excellent

B．good

C．pass

D．fall

血吸虫急性感染可出现

A．尾蚴性皮炎
B．侏儒症
C．结肠癌
D．荨麻疹
E．巨脾