支气管哮喘患者突然出现胸痛、气急、呼吸困难、大汗、不安,应考虑()
A.自发性气胸
B.支气管哮喘急性发作
C.左心衰竭
D.肺炎
E.胸膜炎
参考答案:A
根据单词提示完成句子。
1. It is ____________ (a) egg.
2. Are ____________ (that) eggplants?
3. How many ____________ (flower) are there?
4. I want ____________ (climb) the tree.
5. ____________ (can) she draw?
No, she ____________ (cannot).
简述影响冷凝给热的三个因素。