治疗肺炎支原体肺炎（）
A.青霉素
B.红霉素
C.丁胺卡那霉素
D.磺胺类药物
E.两性霉素
参考答案：B
Maria didn't hear me. She _______ with Betty.[ ]
A. talks
B. is talking
C. talked
D. was talking
地面升降式阻挡设备可以有效阻挡进出车辆。
