CT检查发现颅骨内板与脑表面之间有双凸镜形或弓形血肿影,应考虑为()
A.硬膜下血肿
B.脑内血肿
C.皮下血肿
D.硬膜下一硬膜外沟通型血肿
E.硬膜外血肿
参考答案:E
I had to walk to school because the bus broke down on the way this morning.
A. threw away B. stopped working C. ran slowly
例数均大于100的两样本均数比较的计算公式为()
A.A
B.B
C.C
D.D
E.E