要使函数有意义,只需
x-2≥0x-3≠04-x>0
解得2≤x<4且x≠3
故答案为:{x|2≤x<4且x≠3}
This room is not for so many people to live in. [ ]
A. big enough
B. enough big
C. big too
D. also big
男性,75岁,既往有胃溃疡并胃大切病史10年,近期消瘦明显,左锁骨上可触及肿大淋巴结。以下疾病哪些可能同时伴发()
A.血栓静脉炎
B.黑棘皮病
C.皮肌炎
D.膜性肾病
E.带状疱疹