在ppt演示软件中，先将并列关系的知识点列于一帧中，然后分别通过超连接的形式链接到这些知识点的相关帧，这是线性的纵向导航。()
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Thefanswereveryexcited______DavidBeckhamcametotheshow.
Facedwithrapidinflationand_____internationalandhomemarkets,manyfirmshavedeclaredbankrupt.
______hardworkitis!
I_______thatthere_______aneveningpartyonSaturdayevening.
Idon’tunderstand____believehim.
