食管癌病人出现持续性胸背痛多表示()
A.癌肿较大
B.癌肿部位有炎症
C.有食管气管瘘
D.有远处转移
E.癌肿已侵犯食管外组织
参考答案:E
桑枝的功效有()
A.祛风湿
B.利水消肿
C.利关节
D.清热解毒
E.凉血消肿
下面的哪些程序段可能导致错误 ( ) Ⅰ: String s = "Gone with the wind";String t = "good ";String k = s + t; Ⅱ: String s = "Gone with the wind";String t;t = s[3] + "one"; Ⅲ: String s = "Gone with the wind";String standard = s.toUpperCase(); Ⅳ: String s = "home directory";String t = s-"directory":
A.Ⅱ、Ⅲ
B.Ⅱ、Ⅳ
C.Ⅰ、Ⅳ
D.Ⅲ、Ⅳ