关于肺通气/血流比值（）
A.0.8是各部位的综合值
B.上部比值大于1
C.上部比值等于1
D.中部比值等于1
E.下部比值恰为0.8
参考答案：A
属于分解反应的是
A．Ca（HCO3）2→CaCO3↓+ CO2↑+ H2O
B．2Na + Cl2→2NaCl
C．2Mg + CO2→2MgO + C
D．AgNO3 + NaCl→AgCl↓ +NaNO3
As we all know, it is not important where you come from, but it really ________ where you are going.
A．cares
B．works
C．matters
D．functions
