1．5岁时，腕骨骨化中心有A．0个 B．1个 C．3个 D．4个 E．5个

短文改错(共10小题；每小题1分，满分10分)

One day, there is a blind man sitting with a sign by his feet, that read, “I am blind, please help. ” A creative publicist was walking by him and observed that the man only had a few of

coins in his hat. He put a few of his own coin in it. Without ask for permission, he took the sign, turned it around, and wrote a new message. He then placed it back and left. Later that afternoon publicist returned and noticed that the hat was almost complete full of coins. The blind man recognized his footsteps and asked if it was she that had changed the sign. He wanted to know which the publicist wrote on the sign. The publicist replied, “I just changed your message because people could understand it. ”He said goodbye and went on his way. The blind man didn’t know the new sign was “Today is spring but I cannot see it”.

患者女性，42岁，孕3产1。经量增多并经期延长3年余，同时伴有进行性痛经。妇科检查发现子宫均匀性增大，质硬并有压痛.

根据临床表现及声像图特征，该患诊断为子宫腺肌病，关于子宫腺肌病的声像图描述，不正确的是（）.

A.子宫饱满增大、圆钝

B.子宫肌壁回声粗糙、不均匀

C.子宫内膜增厚、回声增高呈球状，内有多发小点状暗区

D.子宫内膜线多向前移位，也可向后移位

E.增厚的子宫后壁回声有时可见斑点状无回声区

正是我们现在学习的好时光。

体育锻炼对人体健康有何积极作用？