* * 损伤尿外渗产生的严重并发症是()。
A.疼痛
B.溃烂
C.广泛面积的蜂窝织炎
D.肿胀
E.湿疹
参考答案:C
—John, you _____ go out to play until your homework _____.
—OK, Mum.[ ]
A. must; finishes
B. can't; is finished
C. can't; has finished
D. needn't; finishes
MCS-51单片机的地址总线由()构成。