脑外肿瘤向内压迫脑实质，使之受压变平的现象，称为（）。
A.脑白质塌陷征
B.脑灰质塌陷征
C.脑外征
D.硬膜外征
E.脑实质受压征
参考答案：A
----He is fluent in English because he once stayed in London ．
---- Really ? How long _________ there ?
A．did he live
B．has he lived
C．had he lived
D．does he live
下列哪种药物可用于牙龈肿痛、口舌生疮、咽喉红肿、便秘尿赤（）
A.香砂六君丸
B.通宣理肺丸
C.荆防冲剂
D.四季三黄片
