题目内容
Which of the following can lead to the contribution of LAN traffic congestion？(Select all that apply)
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Acknowledgements, sequencing, and flow control are functions that are handled by which layer of the OSI model？
Linux支持多分区结构，依据分区功能填写表3-1中的空(4)～(7)。
For centuries the gypsies have lived as a unfettered people who traveled S1. ______
through half the countries of the world, abiding to their own laws. Scorning S2. ______
discomfort, enduring persecution, accumulating only meager possession, S3. ______
they sacrificed all for their freedom. To be settled people they seemed both
fascinating or fearful, S4. ______
while to the gypsies the settling people were equally fearful. S5. ______
Gypsies acquired in ancient times their traditional occupations like S6. ______
smiths and horse traders. They plied their crafts from village to village,
presenting entertainments to attract townsmen. So they became musicians,
magicians, animal trainer, and acrobats.
A folk saying held that when a gypsy woman predicted misfortune it always
came fact because she stole something from the victim. The gypsies S7. ______
were known also for the big trick which they deceived the credulous. A typical S8. ______
trick was to convince a peasant to bury his money, promising that it S9. ______
would be multiplied by magic powers; when the peasant returned to dig
them up, the money and the gypsies were both gone. The term "gypsy" S10. ______
soon became synonymous with all the robbers and brigands who infested the countryside.
【S1】
工程中有Form1、Form2两个窗体。Forml窗体外观如图1所示。程序运行时，在Forml中名称为Text1的文本框中输入一个数值(圆的半径)，然后单击命令按钮“计算并显示”(其名称为Commandl)，则显示Form2窗体，且根据输入的圆的半径计算圆的面积，并在Form2的窗体上显示出来，如图2所示。如果单击命令按钮时，文本框中输入的不是数值，则用信息框显示“请输入数值数据!”。请填空。
Private Sub Command1_Click()
IfText1．Text=””Then
MsgBox”请输入半径!”
ElseIf Not IsNumerie(【 】)Then
MsgBox“请输入数值数据!”．
Else
r=Val(【 】)
Form2．Show
【 】．Print”圆的面积是”&3．14”r*r
End If
End Sub
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