A：上表皮、下表皮、气孔
B：表皮、叶肉、叶脉
C：栅栏层、海绵层、叶绿体
D：保卫细胞、叶肉、表皮
若关于x的方程2x-4=3m的解满足方程x+2=m，则m的值为（ ）
Everyone except Tom and John _______ seen the film.
—The house is very big and nice.—— Has it got garden?
