题目内容

.input的TYPE属性返回值number定义一个输入数字的输入类，可以直接输入数值或通过微调按钮选择数值。

A. 对
B. 错

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input的required属性定义必须在提交之前填写的输入选项。

A. 对
B. 错

[音频]Going on a working holiday has many advantages:A working holiday visa grants you access to a country for a __1_ period of time than a standard 2_ visa.The travel is sustainable in the sense that _3____ .You can try different types of _4__ , even the ones that you normally wouldn’t do when 5 . And in this sense, a working holiday could be a _6___ experience.You are more likely to meet and make friends with 7_ ,not just _8_ . They can introduce you to _9 .A working holiday makes a good break. A popular time to sign up for a working holiday is the break between 10__ and 11_ or the break after _12 and before _13_____.

公文处理的三大环节有哪些？

请简述收文办理的环节。