knitr::opts_chunk$set(echo = FALSE, fig.align = 'center') library(knitr) options(knitr.duplicate.label = 'allow')
background-image: linear-gradient(to bottom, rgba(0,0,0,0.2) 30%, rgba(0,0,0,0.2) 100%), url(https://liao961120.github.io/slides/img/bg/coffee-blur.jpg) background-position: center background-size: cover
class: title-slide
.bg-text[ .larger[
]
class: center, middle, inverse background-color: black
background-image: url(https://liao961120.github.io/slides/img/pictures/cabin.jpg) background-position: center background-size: cover
class: center, inverse
background-image: url(https://liao961120.github.io/slides/img/pictures/cabin.jpg) background-position: center background-size: cover
class: center, inverse
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