女性,39岁,半年前因肛旁脓肿切开引流,之后局部皮肤反复红肿、破溃,局部痒,应考虑为()
A.混合痔
B.肛瘘
C.肛旁疖肿
D.血栓性外痔
E.肛旁慢性肉芽肿
参考答案:B
— I’d like to go to the cinema with you, Dad.
— Sorry, my darling, but the film is ___________for adults only.
A.appointed
B.intended
C.constructed
D.exposed
X、Y为同主族元素,Y的原子半径大于X.下列说法正确的是(m、n均为正整数)( )
A.若Y的最高正价为+7,则X的最高正价一定为+7
B.若HnXOm为强酸,则X的氢化物溶于水一定显酸性
C.若HnY为气态,则HnX的熔、沸点一定比HnY低
D.若X(OH)n为强碱,则Y(OH)n也一定为强碱