--Remember this, children. careful you are, mistakes you will make. --We know, Miss Gao. A. The more; the fewer B. The more; the few C. The more; the less 答案:A如图,在正方体ABCD-A1B1C1D1中,E、F、G为棱AD、AB、A1A的中点. (1)求证:平面EFG∥平面CB1D1; (2)求证:平面CAA1C1⊥平面CB1D1 ; (3)求异面直线FG、B1C所成的角