脑震荡常出现（）
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：E
The companies are working together to create_______they hope will be the best means of transport
in the 21 st century. [ ]
A. which
B. that
C. what
D. who
灌水法测出的物理性质指标是（）
A.孔隙比
B.密度
C.土粒比重
D.孔隙率
