在等电点以上的pH溶液中氨基酸带() A.正电荷 B.负电荷 C.不带电荷 D.以上

题型:单项选择题

问题:

在等电点以上的pH溶液中氨基酸带()

A.正电荷

B.负电荷

C.不带电荷

D.以上都有可能

考点:食品化学蛋白质蛋白质题库
题型:单项选择题

锝挝慢126德312帼慢涡谩德918

A.1

B.2

C.3

D.4

题型:单项选择题

(Q =" Question;" A = Answer)

Situation I

Q: If someone sits right next to me in an empty movie theater, is it rude to move?

A: Maybe, but nobody will fault you for it. Chances are that close sitter doesn't realize he disturbs you, so he may miss your annoyance. You undoubtedly aren't the first person he's met who needs enough room. Forgive his bad judgment, move quietly and enjoy the show.

Situation II

Q: If I use the bathroom at a store, do I need to buy something?

A: Consider frequency and urgency. Is this a one-time or an emergency? If so, you don't have to buy anything, but it would be kind if you did. However, if you regularly use the bathroom at this place, then you are a customer, and you should act like one.

Situation III

Q: If someone is talking loudly on the bus, is there a nice way to ask him to keep it down?

A: No. Try other means.1) Stare at him until he gets aware of it and quiets down. 2) Lift your finger in a silence motion(动作)and smile. 3) Put on earphones and ignore him.

Situation IV

Q: If I remember my friend's birthday a day late, should I apologize or just wish her a happy birthday like nothing happened?

A: This is the reason why the word belated was invented. "Happy belated birthday!" is short for: "Well, I know I forgot, but then I remembered. Forgive me and happy birthday."

Situation V

Q: Can I lie about seeing a text because I was too busy or lazy to respond(回复) to it?

A: Don't lie. Receiving a text does not mean you need to respond to it. Why waste a perfectly good lie when the truth will serve? "Yes," you can say if ever asked, "I saw it." No explanation is needed as to why you don't respond.

小题1:You will get annoyed in a theater when         .

A.a person is too active

B.a person is too rude to you

C.a person talks too loudly

D.a person sits too close to you小题2:How will you quiet someone down in a public place?

A.By making fun of him continuously.

B.By looking purposefully at him.

C.By talking to him directly.

D.By pointing angrily at him.小题3:The underlined word "belated" in Situation IV probably means      .

A.predicted

B.returned

C.cancelled

D.delayed小题4:What is the passage mainly about?

A.Modern ways to mind your manners.

B.Different ways to change others' manners.

C.Proper manners to offer help to others.

D.Good manners to talk to people.

题型:单项选择题

一定质量理想气体的状态经历了如图所示的ab、bc、cd、da四个过程,其中bc的延长线通过原点,cd垂直于ab且与水平轴平行,da与bc平行,则气体体积在  

[ ]

A.ab过程中不断增加

B.bc过程中保持不变

C.cd过程中不断增加

D.da过程中保持不变

题型:单项选择题

图十所示作品的名称是()。

A.《苕溪诗帖》

B.《蜀素帖》

C.《祭侄文稿》

D.《张好好诗卷》

题型:单项选择题

以下哪一个不属于全球变暖的危害()

A、蒸发变强烈,海平面下降

B、干旱

C、暴雨洪水

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