【简答题】And after World War 2, employers started offering health insurance. Suddenly, demand was (4) . From 1940 to 1955, Americans with health insurance went from 10% to more than 60%, that demand created a...
【简答题】Some people have drawn the conclusion from Bowlbys work that children should be subjected to day care before the age of three because of the parental separation it entails, and many people do believe ...
【判断题】Because the size of hydrocarbon molecules in the mixture of oil and gas and air is different from that of air molecules, there is little difference in the permeability rate in some thin films. Membran...