双线圈检波器,对外磁场来说两线圈所产生的感应电动势是相加的。
参考答案:错
下列哪项属于肺胀痰蒙神窍证的症状
A.神志恍惚
B.谵妄嗜睡
C.烦躁不安
D.尿少怕冷
E.咯痰不爽
Cyclical unemployment is closely associated with:()
A. long-term economic growth.
B. fluctuations in the natural rate of unemployment.
C. short-run fluctuations in the economy.