CT示鞍上池囊实性占位病变,囊壁可见蛋壳样钙化,增强后实性部分强化,应考虑()
A.脑膜瘤
B.垂体瘤
C.生殖细胞瘤
D.颅咽管瘤
E.动脉瘤
参考答案:D
Jenny is on holiday now. I wonder _______. [ ]
A. when she will come back
B. when she came back
C. when will she come back
D. when did she come back
大气中SO2浓度为0.5ppm,则用mg/m3表示为()mg/m3。
A.1.229
B.1.329
C.1.429
D.1.529