某建设拟采用工程量清单计价，请对76～78题做出选择。工程量清单报价的主要形式有(

世袭制代替禅让制，“公天下”变成“家天下”局面开始于[ ]

A．禹

B．启

C．桀

D．周武王

短文改错。

      As student of your age, I understand your situation. That you are facing is common among teenagers. However, it should be wise not to do anything may hurt her feelings. Here are a few suggestion. First, it's advisable to talk most with your mom. Heart to heart talks helped you understand each other better. There are also opportunities to let her knowing your ideas and attitudes toward many things. Second, you should learn to do our own things well, proving to your mom that you are already a "grownup". It's even the better whether you share more in the housework, such cleaning, washing and cooking.

MRI中特殊脉冲序列不包括（）。

A.脂肪抑制

B.磁共振血管成像（MRA.

C.反转恢复序列

D.MRI水成像

E.功能MRI（fMRI）

化学风化

在《雅典学园》这幅画中间指着天的人是谁？（）

A.毕达哥拉斯

B.柏拉图

C.亚里士多德

D.巴门尼德