The collapse is the most dramatic washout from the global credit crunch , a pyrotechnic demonstration of how the crisis can demolish a once-booming economy .
Researchers from harvard school of public health studied 77 students , who had first undergone a seven-day ' washout ' phase in which they drank all cold beverages from stainless steel bottles in order to minimise bpa exposure .
Gansu province lies on typical bess plateau , and highway is seriously destroyed bywater . How to study and explore highway washout and technology of prevention andcure systematically is very important .