关于VHF通信的特点，不正确的是（）
A、是近距离的通信
B、天线尺寸小
C、接收机中须加静噪电路
D、接收机中须加有AGC电路
参考答案：D
—Michael's Chinese is very good. How does he learn Chinese?
—Nobody teaches him. He _____.[ ]
A. teaches himself
B. taught him
C. learns himself
D. learned himself
碘液染色呈阳性的衣原体是（）
A.沙眼衣原体
B.鹦鹉热衣原体
C.肺炎衣原体
D.家畜衣原体
E.贝纳柯克斯体
