人在摄取混合食物时,其呼吸商通常为
A.0.6B.0.7C.0.8D.0.85
参考答案:D
people in the world are suffering from the H1N1 flu.
A.Several thousands of
B.Ten thousands
C.Thousands of
D.Thousands
单向出入的停车场出入口,出入口宽度不得小于( )。
A.7.0mB.5.0mC.6.0mD.4.8m