老年男性病人，最常见的泌尿系统梗阻原因是
A． * * 狭窄
B．膀胱结石
C．前列腺增生
D．膀胱肿瘤
E．神经原性膀胱调节功能障碍
参考答案：C
有关控件对象的Click事件的正确叙述是 ______ 。
A) 用鼠标双击对象时引发 B) 用鼠标单击对象时引发C) 用鼠标右键单击对象时引发 D) 用鼠标右键双击对象时引发
______ trees were cut down. And many birds lost their home. [ ]
A. Two thousands
B. Thousands of
D. Thousand of
