烟草质量检测应由培训合格取得（）的专人负责。
参考答案：上岗证
―Who helped you repair your chair?
―_____! I repaired it all by myself. [ ]
A. Somebody
B. Anybody
C. Nobody
D. Every body
在中和热测定的实验中不需要用到的仪器是[ ]
A．量筒
B．温度计
C．环形玻璃搅拌棒
D．天平
