单项选择题
When starting the gas chromatograph, if the thermal conductivity cell detector is used, the following operation steps should be followed: 1. Open the carrier gas; 2. Temperature rise of gasification chamber; 3. Temperature rise of detection chamber; 4. Temperature rise of chromatographic column; 5. Open the bridge current; 6. Open the recorder, the following operation steps of is absolutely not allowed.
A、2→3→4→5→6→1
B、1→2→3→4→5→6
C、1→2→3→4→6→5
D、1→3→2→4→5→