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1、第1章JavaScript概述JavaScript程序设计基础教程1课后习题1．以下哪个选项是JavaScript技术特征（D）。A．解释型脚本语言B．跨平台C．基于对象和事件驱动D．具有以上各种功能2．编辑JavaScript程序时（C）。A．只能使用记事本B．只能使用FrontPage编辑软件C．可以使用任何一种文本编辑器D．只能使用Dreamweaver编辑工具3．在程序开发过程中，用户输入内容的校验常分为功能性校验和（A）。A．格式性校验B．内容性校验C．事件性校验D．方法性校验4．对于不支持JavaScript程序的浏览器，使用下面哪种标记会把编写的JavaScript脚本
2、作为注释处理（A）。A．标记B．'标记C．//标记D．/**/标记5．在调用外部的JavaScript文件时，下面哪种写法是正确的（B）。A．B．6．如果将JavaScript脚本存储在单独的文件中，那么在IE浏览器中，选择“查看”/“源文件”命令时，查看源文件时（B）显示JavaScript程序源代码。A．会B.不会7．下面哪种JavaScript语法格式是正确的（D）。A．echo"IenjoyJavaScript";B．document.write(Ien
3、joyJavaScript);C．response.write("IenjoyJavaScript");D．alert("IenjoyJavaScript");8．JavaScript脚本是否区分字母大小写（A）。A．区分B．不区分79第1章JavaScript概述2课后习题1．
标记与标记（B）互相嵌套。A．能够B．不能够2．
标记应用于下列哪组标记之间（B）。A．…B．…C．…D．…3．下面哪种标记是浮动框架标记（C）。A．4、>标记B．标记C．iframe标记D．<![CDATA[标记4．标题标记包含6种标记，每一个级别的字体大小都有明显的区分，下面哪级标题的字号最大（A）。A．<h3>B．<h4>C．<h5>D．<h6>5．下面哪种标记是单标记（B）。A．<body>B．<br>C.<title>D．<html>6．在HTML超文本标记语言中，标记（B）大小写。A．区分B．不区分3课后习题一、判断题1．float可以用作标识符。（×）2．在JavaScript中可以用十六进制形式表示浮点数常量。（×）3．字符串变量使用单引号（''）表示。（√）4．在定义JavaScript变量时，一定要</p><p>5、指出变量名和值。（×）5．用var定义一个变量后，如果没有赋予任何值，那么它的值是空值，即null。（×）6．JavaScript规定在使用任何变量之前必须先使用var声明它。（×）7．在使用varx=1声明变量x之后，赋值语句x="我喜欢JavaScript"将出错。（×）8．表达式的类型只取决于运算符，与操作数无关。（×）9．JavaScript中的变量不区分大小写。（×）10．如果有定义varx=true,y=false;那么x&&y的结果是true。（×）二、单选题1．以下哪个常量值最大？DA．70B．025C．0×90D．0X852．下面四个变量声明语句中，哪一个变量的命名</p><p>6、是正确的？B79第1章JavaScript概述A．varforB．vartxt_nameC．varmynamemyvalD．var2s3．下面哪一个语句定义了一个名为Myval的变量并将它的值赋为2205？CA．varmyval=2205B．varMyVal=2205C．varMyval=2205D．Myval=22054．下面哪一个不是JavaScript运算符？DA．=B．==C．&&D．$#5．下面哪一个表达式的返回值为True。AA．!(3<=1)B．(1!=2)&&(2<0)C．!(20>3)D．(5!=3)&&(50<10)6．表达式160%9的计算结果是_____C__</p><p>7、_。A．5B．6C．7D．87．表达式"a90"+"90"的计算结果是___B_____。A．a180B．a9090C．a90D．1808．下列运算符中，___C_____优先级最高。A．==B．&&0C．+D．*=4课后习题一、填空题1．下列JavaScript的判断语句中（A）是正确的。A．if(a==0)B．if(a=0)C．ifa==0thenD．ifa=0then2．下列JavaScript的判断语句中（B）是正确的。A．if(a<>0)then</p> </div>
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