引起便血的小肠疾病不包括（）。
A.肠钩虫病
B.空肠憩室炎或溃疡
C.Meckel憩室炎或溃疡
D.阿米巴痢疾
E.坏死性小肠炎
参考答案：D
The father as well as his three children ____ skating on the frozen river every Sunday afternoon in winter.
A．is going
B．go
C．goes
D．aregoing
如果鼠标器突然失灵，则可用组合键 (9) 来结束一个正在运行的应用程序(任务)。
A．Alt+F4 B．Ctrl+F4 C．Shift+F4 D．Alt+Shift+F4
