【单选题】一个屋顶的某一斜面成等腰梯形,最上面的一层铺了瓦片21块,往下每层多铺1块,斜面上铺了19层,共铺瓦片( )块。
【简答题】一个屋顶的某一个斜面成等腰梯形,最上面一层铺了20块瓦片,往下每一层多铺一块瓦片,斜面上铺了21层瓦片,问共铺了多少块瓦片?(请写下解题过程)
【简答题】There (come, comes) the three noisy children from next door.
【单选题】一个屋顶的某一个斜面成等腰梯形,最上面一层铺了21片瓦片,往下每一层多铺一片瓦片,斜面上铺了20层瓦片,问共铺了多少块瓦片?
【单选题】一个屋顶的某一斜面成等腰梯形,最上面的一层铺了瓦片21块,往下每层多铺1块,斜面上铺了19层,共铺瓦片( )块。
【简答题】There (comes, come) the three moisy children from next door.
【单选题】一个屋顶的某一个斜面成等腰梯形,最上面一层铺了20块瓦片,往下每一层多铺一块瓦片,斜面上铺了21层瓦片,则共铺了( )块瓦片。
【简答题】There (comes, come) ____the tree noisy children from next door.
【单选题】She lived there before he ____ to China. A. came B. comes C. come D. coming
【单选题】There (comes, come) the three noisy children from next door.