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下面一段程序的功能是，单击窗体弹出对话框。在对话框中输入一个文件名，窗体中输出该文件名的文件号。请填空。 Private Sub Form_ click() filename = InputSox (“请输入文件名”) Filecode = Open filename For Output As # Filecode Print filename; “的文件号是”; Filecode Close # Filecode End Sub

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We use language primarily as a means of communication withother human beings. Each of us shares with the community inwhich we live a store of words and meanings as well as agreeing S1.conventions as to the way in which words should be arranged to S2.convey a particular message; the English speaker has in his dis- S3.posal a vocabulary and a set of grammatical rules which enables S4.him to communicate his thoughts and feelings, in a variety ofstyles, to the other English speakers. His vocabulary, in particular, S5.both that which he uses actively and that which he recognises, in-creases in size as he grows old as a result of education and S6.experience. But, whether the language store is relatively small or large, thesystem remains no more than a psychological reality for the indi-vidual , unless he has a means of expressing it in terms able to beseen by another member of his linguistic community; he has to give S7.the system a concrete transmission form. We take it for granted the S8.two most common forms of transmission—by means of sounds pro-duced by our vocal organs (speech) or by visual signs (writing). S9.And these are among most striking of human achievements. S10.

牙线是

A. 机械性去除菌斑和白垢最常用的方法
B. 在操作前需首先进行龈上洁治和根面平整的方法
C. 多用在牙龈乳头退缩或牙周治疗后牙间隙增大时的方法
D. 适用于牙龈乳头丧失的邻间区，以及暴露的根分叉区和排列不整齐的牙邻面的方法
E. 主要用于按摩牙龈，同时去除邻面颈部的牙菌斑的方法

限制某些人群进入研究总体的目的是控制（）

A. 入院率偏倚
B. 信息偏倚
C. 现患-新发病例偏倚
D. 选择偏倚
E. 混杂偏倚

关于加速性损伤的描述错误的是

A. 打击部位的冲击点伤
B. 暴力打击后头部由静止转为运动
C. 暴力作用对侧的对冲性损伤
D. 打击部位的冲击点伤损伤重
E. 头部由运动转为静止