【判断题】由欧姆定律可知,一段导体的电流越大,它的电阻就越小( )
【单选题】关于消化性溃疡,下列不正确的是
A.
胃溃疡患者的平均年龄比十二指肠溃疡约大10年
【判断题】小音程扩大变化半音是大音程。大音程扩大变化半音是增音程。增音程扩大变化半音是倍增音程。
【单选题】What is the MOST important thing you should do before transmitting on a marine radio ?____
B.
Record the time in your radio log
C.
Press the push to talk button three time
D.
Monitor the channel to ensure that it is clear