清洁验证方案应如何制定？
参考答案：
应综合考虑设备的使用情况、使用的清洁剂和消毒剂、取样方法和位置及残留物等。
什么是新能源？
Which statement about transmitting distress messages by radiotelephone is INCORRECT?（）
A.Distress messages should first be transmitted on 2182 kHz
B.It is advisable to follow a distress message on 2182 kHz by two dashes of 10 to 15 seconds duration
C.If no answer is received on the designated distress frequencies，repeat the distress call on any frequency available
D.Channel 16 (156.8 MHz) may be used for distress messages
