Decisionmakersmusthavesomewayofdeterminingofseveralalternativesisbest.()
Apersonisluckyifhiscareer________withhisinterestandhobby
对中国学生而言,用英语思维比说英语更难。
质量m=2kg的质点沿x轴运动,运动方程为x=0.5t2(SI),从t=0s到t=3s过程中,外力对质点做功为()
Thisessayisstilltoolong.I’llhaveto___(short)itbyoneortwopages.