The cars were honking （鸣叫） on the road one morning as I was walking to the park．I walked on and soon found the cause — a little taxi that had got stuck in the middle of th
Rae Armantrout, who has been a poetry professor at the University of California San Diego(UCSD)for two decades, has won the 2010 Pulitzer Prize in the poetry category for her most recent book, “V
,则该卫星的总机械能为____________. 
=m
,所以动能Ek=
mv2=
,卫星的总机械能为E=Ek+Ep=
+(-
)=-
.