疏水柱层析可直接分离盐析后或高盐洗脱下来的蛋白质、酶等生物大分子溶液。

题型:判断题

问题:

疏水柱层析可直接分离盐析后或高盐洗脱下来的蛋白质、酶等生物大分子溶液。

考点:生物分离工程生物分离工程题库
题型:判断题

在测量油液粘度时,直接测量油液的哪个粘度?()

A.动力粘度

B.运动粘度

C.相对粘度

D.粘性

题型:判断题

右图是简易电解水装置图.请回答下列问题:

(1)电解一段时间后,A、B两试管理论上得到的气体体积比为______.

(2)反应的化学符号表达式是:______.

(3)下图是水分子分解的示意图,(○表示氧原子,●表示氢原子).

下列关于该反应的说法中,错误的是______

A.水电解后生成氢气和氧气,说明水中含有氢分子和氧分子

B.生成氢分子和氧分子的个数比为2:1

C.反应前后原子的个数不变

D.反应前后分子的个数不变

(4)用分子和原子的观点解释:水通电分解生成氢气和氧气与水蒸发形成水蒸气的区别.

题型:判断题

下列各条款不属于《辛丑条约》的是(   )

A.赔款2亿两白银

B.拆毁大沽炮台

C.严禁人民参加反帝活动

D.划定北京东交民巷为使馆界

题型:判断题

Valencia is in the east part of Spain(西班牙). It has a port on the sea, two miles away on the coast. It is the capital of a province that is also named Valencia.

The city is a market centre for what is produced by the land around the city. Most of the city’s money is made from farming. It is also a busy business city, with ships, railways, clothes and machine factories.

Valencia has an old part with white buildings, colored roofs, and narrow streets. The modern part has long, wide streets and new buildings. Valencia is well known for its parks and gardens. It has many old churches and museums. The University in the centre of the city was built in the 13th century.

The city of Valencia has been known since the 2nd century. In the 8th century it was the capital of Spain. There is also an important city in Venezuela(委内瑞拉)named Valencia.

小题1:From the text, how many places have the name Valencia?

A.One.  

B.Two.

C.Three.     

D.Four.小题2:What is the main difference between the two parts of the city?

A.The color of the buildings.

B.The length of the streets. 

C.The age of the buildings.

D.The color of the roofs.小题3:When was Valencia the most important city in Spain?

A.2nd century.

B.8th century.

C.13th century.

D.20th century.小题4:What is Valencia famous for?

A.Its seaport.

B.Its University.

C.Its churches and museums.

D.Its parks and gardens.小题5:The main income of the city of Valencia is from its_____.

A.markets.

B.business.

C.factories.

D.farming.

题型:判断题

下列关于肝与月经关系的描述,错误的是()

A.肝血下注冲脉

B.司血海之定期蓄溢

C.肝为气血之根

D.参与月经周期的调节

E.参与经量的调节

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