补全对话

get fit      get up    go to bed     take more exercise     have more energy     feel sleepy

Mum:Betty,are you awake?

Betty:(yawn)(打哈欠的声音)

Mum:Betty,it’s time to 1.________.

Betty:But I still 2.________.I 3.________ very late because I was doing my homework.

Mum:And watching TV.

Betty:Yes,that is true.

Mum:You should stop watching so much TV,and 4.________.If you are active,and you will 5.________.Betty:Really？

Mum:And if you 6.________,you will feel healthier.Also,if you go to bed earlier,you won’t feel tired in the morning.

Betty:Well,if it helps,I’ll try.I will go running in the park.

腰椎间盘疝可以形成椎间盘游离体，下列关于游离体的描述中，哪项错误（）

A.游离体与椎间盘可以在同一层面上

B.游离体可以在椎间盘以上或以下层面

C.游离体密度一般高于硬膜囊

D.游离体密度一般低于硬膜囊

E.游离体一般不增强