关于各类连接接头的适用范围，下列（）项规定有误。A、需作疲劳验算的构件，纵向拉筋不得

通过探究事件的因果关系来把握历史的发展规律，是历史学习的方法之一。下列事件没有因果关系的是[ ]

A．秦朝的暴政——秦末农民起义    

B．汉武帝的文治武功——汉朝进入鼎盛

C．张骞出使西域——丝绸之路的开通

D．司马迁受宫刑——写成《史记》

根据句意及首字母补全单词，使句意完整。

1. In Qing Dao there is an a ________for children to watch seals.

2. Mary's father bought a beautiful bike for her as a birthday g________.

3. The famous movie star will come to our city. I must go there to get his a________.

4. Jane went to China for her vocation and bought some s________ for her friends.

5. Did you see any o________ in the zoo yesterday? No, I didn’t.

6. There is a lot of r________ in summer here.

7. You'd better take an u________. It’s going to rain.

8. What do you want to do in the f________?

9. You should try your best to win this c________.

10. The students in our school had a great school t________.

原发性肝癌肝外血行转移最多见于（）

A.骨

B.脑

C.肾

D.肺

E.膀胱

在非铁合金铸件的生产中，常采用（）直浇道，其特点是充型平稳，能避免金属液氧化和吸气。

A.正圆锥形

B.倒圆锥形

C.蛇形

D.圆柱形

关于肝血管瘤的描述，不正确的是（）。

A.病理上大多为海绵状血管瘤

B.平扫多呈低密度

C.增强扫描从病灶周边部开始强化

D.病灶边缘增强的密度与同一层面的主动脉密度相似

E.与肝癌相比，血管瘤向病灶中心增强的速度较快