Job Recruitment Website - Job seeking and recruitment - (20 14? Environmental protection is an eternal pursuit of a city. In the experiment of testing a new type of energy-saving electric vehicle, electricity with a mass of 8× 102kg was added.
(20 14? Environmental protection is an eternal pursuit of a city. In the experiment of testing a new type of energy-saving electric vehicle, electricity with a mass of 8× 102kg was added.
A, because the abscissa is 1v, the value of point c 1v is the smallest and the speed is the largest in the whole process. So, A is wrong.
The traction of section B and section AB is constant, and according to Newton's second law, the acceleration is constant, so B is correct.
The slopes of C and BC curves represent the power of electric vehicles. When the power of BC section is constant, the traction increases and the speed decreases, so do the deceleration movement. Therefore, c and d are correct.
Therefore: alkaline catalytic decomposition ..
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