函数f(x)=x+2的零点是( )
A.1
B.-2
C.3
D.4
解;由f(x)=x=2=0可得x=-2
故选B
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