—Doctor, I want to know ________________.

—Three times a day after meals.

A．how many times do I take my temperature

B．how often I take my medicine

C．how I do some exercise

D．when do I wash my hands

在下列哪一时相中，肺内压等于大气压（ ）。

A．吸气和呼气初

B．吸气末和呼气初

C．呼气初和呼气末

D．呼气末和吸气初

E．呼气末和吸气末