第3题: [单项选择]A: I'm exhausted. I had to work until 2 o'clock this morning. B:(). A. Don't worry too much. You can do it later. B. Take it easy. You didn't have to work so hard. C. Take time off and let it be. D. Take it or leave it. You don't have to do it. 参考答案:B 答案解析:
第31题: [单项选择]下面关于肺脓肿的描述,错误的是() A. 肺脓肿分急性、慢性两种 B. 血源性肺脓肿常多发,一般为单侧 C. 急性肺脓肿形成的空洞壁厚、不规则,空洞内常有液平 D. 急性肺脓肿炎症阶段X线平片上呈片絮状影,密度较均匀 E. 慢性肺脓肿阴影浓密,空洞可长时间无变化 参考答案:B 答案解析:血源性肺脓肿多为两侧,也可以是单侧多发病灶。