He __________ a basketball, but a baseball.[ ]

A. isn't have

B. isn't has

C. doesn't have

D. doesn't has

溃疡性结肠炎患者容易并发中毒性巨结肠的情况是

A．重症患者接受激素治疗时
B．重症患者接受水杨酸柳氮磺胺吡啶治疗时
C．重症患者接受胆碱能受体拮抗剂时
D．重症患者接受抗生素治疗时
E．重症患者接受全胃肠道外营养治疗时