Frances O’Grady, the TUC general secretary, said: “Two people working next to each other, doing the same job, should get the same pay rates. But too often agency workers are treated like second-class citizens. With the expansion of the global economy, Mr Trump may hope that tax cuts and deregulation will spur enough growth and create enough jobs that he will boast about. A 2 per cent potential growth rate does not necessarily help his blue-collar base, but it could at least push the stock market to its highest ever level. Although, of course, including republican all mainstream economists agree that, regardless of his policies, potential growth rate will remain at about 2%, still trump will claim that the U.S. economy can grow at 4%. Nowadays, electric vehicles are referred to as pure electric vehicles, namely, a car that USES a single battery as the energy source for energy storage. It USES the battery as the energy source to power the motor, which drives the motor and drives the car forward. In terms of appearance, electric cars are indistinguishable from everyday cars. The difference lies mainly in the power source and the driving system. The accounting income follows the historical cost principle and the matching principle, which is conducive to the objective reflection of the business management responsibility of the enterprise management authorities. But, due to the historical cost principle inherent defects, especially according to the present value of revenue and expenses by historical cost line, makes the calculation of accounting earnings lack of inner logical unity, and the matching principle is difficult to carry out, so that the book value of assets can not reflect its real value, cost cannot be fully compensated. And the economic benefit is measured in the current value, which reflects the actual value of the asset, which is beneficial to the full compensation of the cost.