A.华为Mate60pro系列“争气机”的芯片材料主要为晶体硅 |
B.用机械剥离法从石墨中分离出的石墨烯能导电,石墨烯与金刚石互为同素异形体 |
C.国产飞机C919用到的氮化硅陶瓷是新型无机非金属材料 |
D.国产飞机C919内的椅罩、门帘等使用国产芳砜纶纤维,芳砜纶纤维属于天然纤维 |
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