判断气管导管误入食管的最佳方法是()

A．SpO2下降

B．手控通气阻力大

C．通气时腹部隆起

D．听诊

E．呼气末CO2曲线消失

Which of the following is true about the WBS:

A) The WBS is another term for the Gantt chart.
B) Each descending level of the WBS represents an increasingly detailed definition of the project work.
C) Work not in the WBS is usually defined in the scope statement of the project.
D) The WBS shows only the critical path activities.