问题 单项选择题

肝脏在脂肪代谢中产生过多酮体主要由于

A.肝功能不好

B.肝中脂肪代谢紊乱

C.酮体是病理性代谢产物

D.脂肪摄食过多

E.糖的供应不足

答案

参考答案:E

解析:正常情况下,糖供应充足时,机体主要利用葡萄糖供能;但在长期饥饿和葡萄糖供应不足时,会动员脂肪供能。脂酸在肝中裂解生成酮体,转移到肝外被脑等组织利用。正常代谢状态下,体内会产生少量酮体,因此酮体不是病理性代谢产物。只要糖供应充足,糖代谢正常,即使脂肪摄人过多,肝脏也不会产生过多的酮体。当糖代谢或脂酸代谢紊乱时,酮体产生过多,超过肝外组织的利用能力时,酮体才是病理性代谢产物。

阅读理解

The Taj Mahal (泰姬陵) is considered to be one of the most beautiful buildings in the world and the finest example of the late style of Indian architecture (建筑). It is at Agra in northern India. It lies beside the River Jumna in the middle of gardens with quiet pools.

  The Taj Mahal was built by the Mogul emperor (皇帝) Shah Jehan, who ruled India in the seventeenth century. It is in memory of his favorite wife, Arjumand Banu Bagam, known as Mumtaz Mahal, who died in 1631. The building, which was completed between 1632 and 1638, was designed by a local Muslim architect (建筑师), Ustad Ahmad Lahori. The whole building, with gardens and gateway structures, was completed in 1643. The Taj Mahal stands at one end of the garden tomb with marble (大理石) path. The room is softly lighted by the light that passes through double screens of carved marble set high in the walls. The building now is kept in good condition.

  The Taj Mahal took 22 years to build. Shah Jehan planned a similar building, but in black instead of white, to lie on the other side of the river. But before it could be built, Shah Jehan was imprisoned (监禁) by his son and buried next to his wife in the Taj Mahal.

小题1:The Taj Mahal was built for____ .

A.Mumtaz

B.Shah

C.Either Mumtaz or Shah

D.Both Mumtaz and Shah小题2: Why do you think Shah Jehan was buried next to his wife?

A.His own tomb hadn’t been built.

B.He hoped to be buried there.

C.King and Queen should be buried together

D.He liked Mumtaz all his life.小题3:The passage mainly tells us____ .

A.why the Taj Mahal was built

B.the love story between Shah and Mumtaz

C.some information about the Taj Mahal

D.the Taj Mahal—the pride of Indians小题4:Form the passage we can learn that____ .

A.the Taj Mahal looks more beautiful than before .

B.the Taj Mahal doesn’t exist now.

C.the Taj Mahal has completely changed.  

D.the Taj Mahal has become a place of interest.

单项选择题