VB显示温度曲线（串口传输）
..........................\aa.txt
..........................\Form1.frm
..........................\Form1.frx
..........................\MSSCCPRJ.SCC
..........................\Temperature_history.txt
..........................\工程1.exe
..........................\工程1.PDM
..........................\工程1.vbp
..........................\工程1.vbw