检查检修设备有无突然来电的危险是（）职责。
A、工作票签发人
B、工作负责人
C、工作许可人
参考答案：C
向淀粉中加少量稀硫酸，加热使之发生水解，为测定水解的程度所需的试剂是 [ ]
①NaOH溶液 ②新制氢氧化铜浊液 ③碘水 ④BaCl2溶液
A．②③
B．①②③
C．①②④
D．②③④
The teachers want to take away with the cheating in examinations in their school.
A．do away with
B．put away with
C．get away with
D．turn away with
