In order to discharge a CO2 portable fire extinguisher, the operator must FIRST ______.
举一反三
- If heavy smoke is coming from the paint locker,the first firefighting response should be to（）. A: release the CO fiooding system B: open the door to evaluate of the fire C: enter and use a portable extinguisher D: secure the ventilatio
- 138． After using a C0 portable extinguisher，it should be ______.
- A “fifteen-pound” CO2 extinguisher is so called because（）. A: there are fifteen pounds of CO2 in the container B: the container，when full，weighs fifteen pounds C: the pressure at the discharge nozzle is l5 psi D: the empty container weighs fifteen pounds
- In the cause-effect order, you must put forward causes first and effects second.
- We must get up early________we can catch the first bus to school. A: so that B: such that C: in order to D: in order