后弹性层破裂可见于()
A.产伤
B.圆锥角膜
C.眼球钝挫伤
D.先天性青光眼
E.Fuchs角膜营养不良
参考答案:A, B, C, D
I'm tired out. I ______ all afternoon and I don't seem to have finished anything.
A. shopped B. have shoppedC. had shopped D. have been shopping
下面哪些特征属于TCP协议所特有()。
A.面向连接
B.面向无连接
C.提供可靠传输服务
D.提供不可靠传输服务