水池内有一个直立的棱长为4分米的正方体木块,它入水深度为3分米,露在水面上的木块的表面积是多少平方分米?
A. 4×3×6=72(平方分米)
B. 4×4×3=48(平方分米)
C. 3×3×4+4×4=52(平方分米)
D. 4×4+4×3×4=64(平方分米)
F.4×4+4×(4﹣3)×4=32(平方分米)
同类型试题
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2