肺脓肿早期最易与下列哪种疾病混淆()。
A.支气管扩张
B.支气管肺癌并感染
C.细菌性肺炎
D.空洞型肺结核
E.肺囊肿并感染
参考答案:C
根据句意,选择括号中适当的词或短语填空。
1. Is this _____ (your/yours) eraser?
2. This is not _____ (their/theirs) school.
3. —Whose are those?
—The new ones are _____ (my/mine).
4. _____ (Who's/Whose) desks are these?
5. The cat _____ (looks like/looks) a hat (帽子).
色谱系统的适用性试验通常包括下列哪几项指标()。
A.理论板数
B.分离度
C.重复性
D.拖尾因子
E.对称性