A.摄入过多油脂易引发肥胖和心脑血管疾病,因此不能食用过量油脂类食物 |
B.用甲醛浸泡水产品,会破坏蛋白质结构,使其变质,因此甲醛对人体健康有严重危害 |
C.青少年因缺钙会患佝偻病和发育不良,可食用奶制品等含钙丰富的食物 |
D.吸烟有害健康,但吸电子烟对健康无害 |
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