皮皮学，免费搜题
登录
搜题
【简答题】
阅读下面关于“超文本标记语言”知识的英文短句,从中领悟并掌握专业文献的翻译方法,培养外文文献的研读能力。 (1)The header element [1] . Recently, we have seen a growing interest in HTML5 and its adoption by web professionals. Within the HTML5 specification we can see that there have been a significant number of new elements added. So you’re used to seeing
on a large majority of sites that you visit, well now with HTML5 that isn’t required anymore we can add some more semantic value with the
element. What is required in the
element ?We now know that we can have multiples headers in a page but what are the must have’s within the element in order for it to validate? In short, a
typically contains at least (but not restricted to) one heading tag (
–
). The element can also contain other content within the document flow such as a table of contents, logos or a search form. Following a recent change to the spec you can now include the
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈参考答案：
举一反三
【单选题】如果副翼的一个PCU输入杆因故不能自由移动，则在进行横滚操纵时（）.
A.
只能操纵未出故障的PCU对应的一侧副翼
B.
飞行员将施加额外的力来压缩或拉伸有故障的PCU输入杆中的弹簧，而另一PCU可正常地操纵两侧副翼
C.
只能操纵飞行扰流板来进行横滚控制，因为任一PCU输入杆不能自由移动都可形成液锁
D.
副翼机身扇形盘上的剪切销将切断以保护PCU机构不被损坏
参考解析：
知识点：
题目纠错 0
发布
