【简答题】如图1-39所示,A、B两物体均重G=10N,各接触面间的动摩擦因数均为μ=0.3,同时有F=1N的两个水平力分别作用在A和B上,则地面对B的摩擦力等于______,B对A的摩擦力等于______.
【单选题】1-(4-氟苯基)-4-[4-(4-氯苯基)-4-羟基-1哌啶基]-1-丁酮是
【单选题】There will be a(n) ______ telecast of football match tonight.
【单选题】α-(2,4-氟苯基)-α-(1H-1,2,4-三唑-1-基甲基)-lH-1,2,4-三唑-1-基乙醇
【单选题】There will be a (n) _____ TV programme of the football match between China and Brazil tonight. [ ]
【简答题】化学名为α-(2,4-二氟苯基)-a-(1H-1,2,4-三唑-1-基甲基)-1H-1,2,4-三唑-1-基乙醇的是( )。
【单选题】There will be a(n) _______ telecast of a football match tonight.
【简答题】There will be a(n)______ football match on TV tonight.A. living B. alive C. live D. lively
【简答题】There will be a(n) _____ telecast of football match tonight. A) lively B) active C) alive D) live
【单选题】化学名为1-(4-氟苯基)-4-[4-(4-氯苯基)-4-羟基-1哌啶基]-1-丁酮的是