—How much ______?

—______ 20 yuan. [ ]

A. are the apples; It's

B. is that shirt; They're

C. are the shoes; They're

D. are the T-shirt; It's

下列哪项是肺总量()

A．一次平静呼吸进出肺内的气量

B．最大吸气所能吸入的最大气量

C．在平静呼气后作最大呼气，呼出的气量

D．最大呼气后仍残留在肺内的气量

E．深吸气后肺内所含的全部气量