【简答题】With the variation s of G and R, the solidification mode may change from planar to _____________ 、 _____________ and _____________ across the fusion zone 。
【简答题】"Bus.txt" shows total expenses (£100,000s) and car miles (million miles) for a bus company, and the observations are independent. We are interested in investigating how the car expenses increases wit...
【判断题】注气压缩机的工况与储气库地层状态密切相关,在注气过程中,压缩机出口压力随地层压力升高而升高,变化幅度很大,在流程设计中要充分考虑适应这种变化。为此可采取两种措施The working condition of the gas injection compressor is closely related to the formation state of the gas storage reser...
【单选题】【图片】These plots summarizes the variation in ΔG with temperature for the four possible combinations of arithmetic sign for ΔH and ΔS. If ΔH is positive what condition has ΔS to fulfill to get a spontane...