feat(Go-Tool)：2021/03/18：新增超过半数数字系列算法题，新增出现次数不同的数字系列算法题

algorithm/numberList/NumberCount/OnlyTwoNumberShowOnce_test.go

@@ -0,0 +1,19 @@
+/*
+ *  @Author : huangzj
+ *  @Time : 2021/3/16 18:02
+ *  @Description：
+ */
+
+package NumberCount
+
+import (
+	"fmt"
+	"testing"
+)
+
+func TestOnlyTwoNumberShowOnce(t *testing.T) {
+	fmt.Println(OnlyTwoNumberShowOnce([]int{2, 3, 4, 5, 6, 2, 3, 4, 5, 6, 1, 7}))                           //1,7
+	fmt.Println(OnlyTwoNumberShowOnce([]int{2, 3, 4, 5, 6, 2, 3, 4, 5, 6, 1, 7, 8, 9, 0, 19, 19, 0, 8, 9})) //1,7
+	fmt.Println(OnlyTwoNumberShowOnce([]int{2, 3, 4, 5, 1, 7, 5, 4, 3, 2}))                                 //1,7
+	fmt.Println(OnlyTwoNumberShowOnce([]int{2, 3, 4, 5, 6, 2, 3, 4, 5, 6, 1, 7, 1, 100}))                   //1,100
+}