鼓膜外伤性穿孔多呈不规则形或裂隙状，应使用抗生素滴耳液滴耳以预防感染。
参考答案：错
The students are having an _______ running race. They're very ________.[ ]
A. exciting; exciting
B. excited; exciting
C. exciting; excited
D. excited; excited
与PTK信息传递途径有关的物质是（）
A.cGMP
B.cAMP
C.Raf
D.JAK
E.HSP
