Merge branch 'fix' into 'master'

fix happen See merge request !3

Merge branch 'fix' into 'master'
35d7c6ed · 赵鹏翀 · 6a0cfd4a · 594d0e68 · 35d7c6ed · 35d7c6ed
--- a/Lab007.dlproj
+++ b/Lab007.dlproj
@@ -4,6 +4,7 @@
  <files>
    <file relativepath="74LS151.dlsche"/>
    <file relativepath="README.md"/>
+    <file relativepath="happen.dlsche"/>
  </files>

 </project>
--- a/README.md
+++ b/README.md
@@ -2,3 +2,4 @@
 序列信号的产生与检测
 # 原理图
 ![raw svg](74LS151.dlsche.svg)
+![raw svg](happen.dlsche.svg)
\ No newline at end of file
--- a/happen.dlsche
+++ b/happen.dlsche
--- a/happen.dlsche.svg
+++ b/happen.dlsche.svg