话音和铃频信号送不出去，导频发送正常，故障点在（）
A.中频调幅盘以下
B.电源盘
C.中频振荡停振
参考答案：A
诊断慢性浅表性胃炎最有意义的一项是（）。
A.黏膜浅层有水肿、点状出血和上皮坏死
B.黏膜浅层有炎细胞浸润、腺体增生
C.黏膜浅层有炎细胞浸润、腺体破坏
D.黏膜浅层有嗜酸性粒细胞和中性粒细胞浸润
E.黏膜浅层有淋巴细胞、浆细胞浸润
E-mail, as well as telephones, _____ an important part in daily communication. [ ]
A. is playing
B. have played
C. are playing
D. play
