单项选择题
A.101.3Pa B.101.3kPa C.100.3Pa D.113kPa E.103kPa
A.0℃ B.10℃ C.15℃ D.20℃
A.温度为0℃,大气压为1.013×105PaB.温度为20℃,大气压为1.013×105PaC.温度为0℃,大气压为1×105PaD.温度为25℃,大气压为1.013×105Pa
A.粉尘、烟和雾 B.气态、蒸汽态和烟雾态 C.气态、液态和固态 D.气态、蒸汽态和气溶胶态
A.活性碳管采样 B.硅胶管采样 C.有机聚合物管采样 D.玻璃微球管采样
A.50/50mg B.75/50mg C.100/50mg D.150/50mg
A.15min B.60min C.120min D.480min
A.直接阻截 B.惯性碰撞 C.扩散沉降 D.化学吸收
A.0.5–5mg B.0.5–10mg C.1–5mg D.1-10mg E.1–15mg
A.0.5h; B.1h; C.2h; D.4h;
A.90%以上,不得低于75% B.95%以下,不得低于75% C.98%以下,不得低于70% D.90%以上,不得低于65%