diff --git a/work/work.py b/work/work.py
deleted file mode 100644
index 96b5dff..0000000
--- a/work/work.py
+++ /dev/null
@@ -1,13 +0,0 @@
-#1
-a="Hello"
-for i in a:
-    print(ord(i))
-print(chr(65))
-
-#3
-A=[3,4]
-B=[1,2]
-AB=[(A[0]+B[0]),(A[1]+B[1])]
-print(AB)
-A2=[(A[0]*2),(A[1]*2)]
-print(A2)
diff --git a/work/work（2）.py b/work/work（2）.py
new file mode 100644
index 0000000..bcd5c3d
--- /dev/null
+++ b/work/work（2）.py
@@ -0,0 +1,28 @@
+import numpy as np
+#1
+a="Hello"
+for i in a:
+    print(ord(i))
+print(chr(65))
+
+#3
+A=np.array([3,4])
+B=np.array([1,2])
+AB=A+B
+print(AB)
+A2=2*A
+print(A2)
+moA=np.linalg.norm(A)
+print(moA)
+
+#4
+C=np.array([1,2,3])
+D=np.array([4,5,6])
+dotCD=np.dot(C,D)
+print(dotCD)
+
+#5
+Doc1="Python是编程语言"
+Doc2="Java是编程语言"
+Doc1="Python Python Python"
+