安全监测工()执行交接班制度和填报签名制度。
A、严格
B、一定
C、可以不
参考答案:A
Duty is an act or a course of action that people _____ you to take by social customs, law or religion.[ ]
A. persuade
B. request
C. instruct
D. expect
化工厂送来盐酸一车,测其比重1.16g/cm3,取1ml稀释至1000ml,取其中100ml于锥形瓶中,用C(NaOH)=0.1mol/L标准溶液滴至甲基橙终点消耗9.50ml,求盐酸浓度?(Cl分子量为35.5)