整联蛋白识别的主要部位是配体上的()、()、Gly、Asp。

题型:填空题

问题:

整联蛋白识别的主要部位是配体上的()、()、Gly、Asp。

考点:生物学细胞基本知识细胞基本知识题库
题型:填空题

下列容器中盛有海水,纯铁在其中被腐蚀时,由快到慢的顺序是    (  )

A.⑤②①④③

B.③②⑤①④

C.⑤④②③①

D.⑤②①③④

题型:填空题

根据如图所示的实验装置图回答:

(1)写出编号的仪器名称:①______.

(2)实验室常用稀盐酸和石灰石反应制取CO2,制取并收集CO2,应选用的实验装置为______(填序号);该反应的化学方程式为:______;

(3)如果要检验二氧化碳是否收集满,可将燃着的木条______,如果木条熄灭说明二氧化碳已经收集满.

(4)如图2所示装置可用来测量生成CO2的体积,其中在水面上放一层植物油的目的是:______.植物油上方原有的空气对实验结果______(填“有”或“无”)明显影响.

题型:填空题

In most languages, a greeting is usually followed by “small talk”. Small talk means the little things we talk about at the start of a conversation. In English-speaking countries people often make small talk about the weather. “Nice day, isn’t it?” “Terrible weather, isn’t it?” But there is something special about small talk. It must be about something which both people have the same opinion about. The purpose of small talk is to let both people agree on something. This makes meeting people easier and more comfortable. People usually agree about the weather, so it is a safe topic for small talk. But people often disagree about religion(宗教) or politics(政治) so these are not suitable topics for small talk. The topics for small talk also depend on where the conversation is taking place. At football matches, people make small talk about the game they are watching. “Great game, isn’t it?” At bus-stops, people may comment on the transport system. “The bus service is terrible, isn’t it?”

小题1:Small talk is _______________.

A.a kind of conversation with short words

B.a greeting used when people meet each other

C.to let people disagree about something

D.something we talk about to start a conversation小题2:The favorite topic of small talk for English people is _________.

A.the weather

B.politics

C.games

D.languages小题3:The passage suggests that when we learn a language _________.

A.we should learn about the transport system of the country

B.we should only master the grammar and the vocabulary

C.we should learn the culture of the country

D.we should understand the importance of the language小题4:When we say “Great game, isn’t it?”, we are in fact __________.

A.asking a question

B.having a conversation

C.greeting each other

D.making small talk小题5:What we learn from the passage is that __________.

A.different languages have different grammar

B.small talk is an important part of a language

C.small talk depends on the purpose of the conversation

D.in English-speaking countries we should talk about the weather

题型:填空题

除灰系统输送循环失败报警条件是什么?

题型:填空题

西晋傅咸说:“夫其何物,厥美可珍。廉方有则,体洁性贞。含章蕴藻,实好斯文。取彼之弊,以为此新。”与此相关的发明是()

A.造纸术

B.印刷术

C.指南针

D.火药

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