脑挫裂伤常出现（）
A.面神经损伤
B.腰穿脑脊液呈血性
C.熊猫眼征
D.乳突部皮下淤血斑
E.逆行性遗忘
参考答案：B
— He's already back to Australia, _____?
— _____. He is on a visit to Shanghai. [ ]
A. isn't he; No
B. hasn't he; Yes
C. isn't he; Yes
D. hasn't he; No
粘土岩的分布范围广泛，约占沉积岩总量的（）。
A、30%
B、70%
C、50%
D、80%
