菌落

Modern industrial society grants little status to old people. In fact, such a society has a system of built-in obsolescence. There is no formal system for continuing our education throughout our life in order to keep up with rapidly changing knowledge. When our education and job skills have grown obsolete, we are treated exactly like those who have never gained an education or job skills and are not encouraged or given the opportunity to begin anew.
As a society becomes more highly developed, the overall status of older people diminishes. Improved health technology creates a large pool of old people, who compete for jobs with the young. However, economic technology lowers the demand for workers and creates new jobs for which the skills of the aged are obsolete, forcing older people into retirement. At the same time, young people are being educated in the new technology and are keeping pace with rapid changes in knowledge. Finally, urbanization creates age-segregated neighborhoods. Because the old live on fixed incomes, they must often live in inferior housing. All these factors—retirement, obsolete knowledge and skills, inferior standards of living—lower the status of the aged in society.
A century ago, when one could expect to live only to 50 or so, the life span more or less coincided with the occupation and family cycle. But today the average life span allows for fifteen to twenty years of life after these cycles. It appears that our life span is outpacing our usefulness in society.

According to this passage, the status of the aged is lowered by their ______.

A．forced retirement

B．inferior housing

C．longer life span

D．fixed incomes

如果想要仔细研究洛克的政治分权学说，可以参考的著作是：

A．《政府论》

B．《社会契约论》

C．《百科全书》

D．《论法的精神》

蒙古第一次西征，最远打到（）

A.多瑙河流域

B.伏尔加河流域

C.巴尔喀什湖

D.里海

有一个VBA计算程序的功能如下：该程序用户界面由4个文本框和3个按钮组成，4个文本框的名称分别为Text1、Text2、Text3和Text4，3个按钮分别为清除(名为Command1) 、计算(名为 Command2) 和退出(名为Command3) 。窗体打开运行后，单击清除按钮，则清除所有文本框中显示的内容；单击计算按钮，则计算在Text1、Text2和Text3三个文本框中输入的3科成绩的平均成绩并将结果存放在Text4文本框中；单击退出按钮则退出。请将下列程序填空补充完整。
Private Sub Command1_Click( )
Me!Text1=""
Me!Text2=""
Me!Text3=""
Me!Text4=""
End Sub
Private Sub Command2_Click( )
If Me!Text1=""Or Me! Text2=""Or Me! Text3=""Then
MsgBox“成绩输入不全”
Else
Me!Text4=( [13] +Val(Me!Text2) +Val(Me!Text3) ) /3
[14]
End Sub
Private Sub Command3_Click( )
DocmD [15]
End Sub

冷拉卷扬机使用前应检查钢丝绳是否完好，轧钳及特制夹头（）的是否良好。