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.
