自发性气胸典型的临床症状是()。
A.咳嗽、咳痰、咯血
B.胸痛、干咳、咯血
C.咳痰、咯血、呼吸困难
D.胸痛、干咳、呼吸困难
E.伴有哮鸣音的呼气性呼吸困难
参考答案:D
破伤风病人大量注射破伤风抗毒素的目的是()
A.抑制破伤风芽孢杆菌的生长
B.促使已结合的毒素解离
C.刺激机体产生抗体
D.中和游离毒素
E.抑制毒素的产生
Many children seldom communicate with adults, ________ it difficult for their parents to know what they are thinking about.
A.making
B.makes
C.to make
D.made