化学工程专业英语考试重点.docxVIP

Math Section: Real: rational consists of Integer and fraction, decimal fraction, irrational. Complex Figures: rectangle; parallelogram; rhombus; trapezoid 3D graphics: rectangular prism; cyclinder; cone; sphere Number theory: odd; even; prime number Angles: alternate; corresponding; vertical; obtuse; acute; straight Coordinate: Ordinate Quadrant Abscissa Rectangular coordinate Basic math symbols and reading writings: N! : factorial : greater than ≥: greater than or equal to ≤: less than or equal to 2n: square root of n 3n: cube root of n nn: nth root of n ln (x): natural logarithm of x log (x): logarithm to the base 10 of x loga (x): logarithm to the base a of x |a|:absolute value of a xn: the nth power of x x2: the square of x dny/dxn :the nth derivative of y to x ?ny/?xn: the nth partial derivative of y with respect to x ydx: integral of y with respect to x abydx: integral of y between limits a and b 1,234,567,000: one billion, two hundred and thirty-four million, five hundred and sixty-seven thousand Phys Section: Prefix: Other units: Temperature: Kelvin(K), Celsius(oC), Fahrenheit Current: ampere Volume: 1 cubic meter=1 liter Force: 1 N(Newton)=105 dyne, 1kgf=9.8N(Newton) Pressure:1atm (atmosphere)= 101.325kPa, 1kPa=7.5mmHg, 1kPa=0.01bar Thermal:1J(Joule)=0.2389cal(calorie) Power:1kW(kilowatt)=1.34HP(horse power) Viscosity: cp(centipoise)=mPa·s Charge: 1Ah=3600C 1As=1C(coulomb) TEM(Transmission electron microscopy): TEM samples of silver nanoparticles were prepared by placing a drop of silver hydrosol on carbon coated copper grids and allowing water to completely evaporate. High-resolution TEM images were obtained, and energy dispersive X-ray (EDX) analysis was performed on Tecnai F30 microscope (FEI, The Netherlands). SEM(scanning electron microscope): A type of electron microscope that produces images of a sample by scanning it with a focused beam of electrons. FTIR(Fourier transform infrared spectroscopy): It covers a rang