当（）时，定压式扩音机与定阻扩音机一样也会损坏。
A.负载很轻
B.负载开路
C.负载较轻
D.严重超载
参考答案：D
The kids seated themselves________to the teacher and listened________with great interest. [ ]
A. closely; close
B. closely; closely
C. close; closely
D. close; close
望形体，主要观察患者形体的（）（）和胖、瘦等。
