如下图所示，某校园网使用10Gbps的POS技术与CERNET相连，POS接口的帧格

已知两个相似三角形，其中一个三角形的三边的长分别为2，5，6，另一个三角形的最长边为15cm，则它的最短边是______cm．

一般认为H反射潜伏期双侧对比超过多少时有诊断意义（）

A.1.0ms以上

B.0.5ms以上

C.1.2ms以上

D.1.5ms以上

E.2.5ms以上

"Congratulations, Mr. Jones, it’s a girl. "

Fatherhood is going to have a different meaning and bring forth a different answer from every man who hears these words. Some feel proud when they receive the news, while others worry, wondering whether they will be good fathers. Although there are some men who like children and may have had considerable experience with them, others do not particularly care for children and spend little time with them. Many fathers and mothers have been planning and looking forward to children for some time. For other couples, pregnancy was an accident that both husband and wife have accepted willingly or unwillingly.

Whatever the reaction to the birth of a child, it is obvious that the change from the role of husband to that of father is a difficult task. Yet, unfortunately, few attempts have been made to educate fathers in this re-socialization process. Although many good books have been written about American mothers, only recently have some books discussed the role of a father.

It is argued by some writers that the transition to the father’s role, although difficult, is not nearly as great as the transition the wife must make to the mother’s role. The mother’s role seems to require a complete transformation of daily routine and adaptation to a new life, on the other hand, the father’s role is less demanding and immediate. However, even though we have mentioned the fact that growing numbers of women are working outside the home, the father is still thought by many as the breadwinner in the household.

It is stated in the passage that（）

A. some parents are not prepared to have a child

B. young couples do not like children at all

C. working couples do not have much time to take care of their children

D. many parents look forward to having a boy as their first child

SAH患者出现一侧眼睑下垂时，其动脉瘤的部位可能在（）

A.大脑中动脉

B.前交通动脉

C.后交通动脉

D.基底动脉

E.眼动脉

去甲肾上腺素能神经包括：

A．使骨骼肌血管舒张的神经纤维
B．支配汗腺分泌的交感神经节后纤维
C．二者都是
D．二者都不是