(1)在救灾人员进入灾区之前,卫生防疫人员为队员们注射了破伤风疫苗等,以防外伤对救灾人员造成二次伤害,请问注入的疫苗属于
(2)在救灾时,一名救灾人员不幸被掉落的石块砸伤,伤口处鲜红色的血液喷涌而出,经判断是
(3)对震区进行大面积消毒,消灭蚊蝇,属于预防传染病措施中的
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