已知CO、CO2的混合气体质量共10g,标准状况下体积为6.72L,试求混合气体中CO、CO2的质量及体积。
mCO=5.6g;VCO=4.48L
=4.4g;=2.24L
△ABC的三个顶点的坐标分别为点A(-2,4)、B(3,4)、C(-4,-1),求△ABC的面积.
Mr.Hunter managed to his neglect of his duty on the basis of his poor health. [ ]
A.remember
B.forget
C.reject
D.justify