枕骨大孔疝与小脑幕裂孔疝主要临床表现差别在于（）
A.剧烈头痛
B.频繁呕吐
C.烦躁不安
D.血压升高
E.早期发生呼吸骤停
参考答案：E
About ________ of the workers in the factory were born in the ___________.
A．two-thirds;1970
B．two-thirds;1970s
C．two-third; 1970
D．two-third;1970s
试述中国古代史学在史家修养论上的理论贡献
