世界卫生组织欧洲地区办事处建议TCDD的容许摄入量为()。
A: 15pg/(kg·d)
B: 10pg/(kg·d)
C: 20pg/(kg·d)
D: 30pg/(kg·d)
A: 15pg/(kg·d)
B: 10pg/(kg·d)
C: 20pg/(kg·d)
D: 30pg/(kg·d)
举一反三
- 单位关系如下正确的是（）。 A: ng/mL=ng/g=mg/kg=mg/L=ppb=10-6 B: ng/mL=ng/g=ug/kg=ug/L=ppb=10-9 C: pg/mL=pg/g=ng/kg=ng/L=ppt=10-12 D: 1mL=1000uL
- Most of the airlines have the allowance of ______ for first-class passengers. A: 40 kg B: 30 kg C: 20 kg D: 10 kg
- 纠正中度脱水，补充累积损失量应为（） A: 10～20ml/kg B: 20～30ml/kg C: 30～50ml/kg D: 50～100ml/kg E: 100～120ml/kg
- Most of the airlines have the allowance of ______ for economy class passengers. A: 40 kg B: 30 kg C: 20 kg D: 10 kg
- Most of the airlines have the allowance of ______ for business class passengers. A: 40 kg B: 30 kg C: 20 kg D: 10 kg