问题 单项选择题

取两种不同的海绵,使其细胞分散成单个,再将它们掺在一起培养,发现只有同种的细胞才能结合。那么,与此现象有关的结构是()

A.细胞核

B.细胞膜上的磷脂双分子层

C.细胞膜

D.细胞膜上的糖蛋白

答案

参考答案:D

解析:糖蛋白具有细胞识别的功能,就像同种生物的精子和卵细胞才能融合,就靠细胞膜上的糖蛋白一样,故D正确。考点:本题考查细胞结构的相关知识,意在考查考生对知识的识记、理解和综合运用能力。

单项选择题 共用题干题
阅读理解

Without mutual(相互的)respect, any relationship will be an unhappy one . People who respect each other: a) value each other’s opinions, b) listen to each other, and c) disagree without screams or insults(侮辱). And remember, your parents have lived longer than you—don’t discount their experience and knowledge.

Your parents want to know what’s going on in your life. If you don’t tell them they won’t know when you need their help or whether they can trust you. Tell them what you’re doing, share your thoughts and feelings with them, and ask for their advice for your problems( you don’t have to follow it). Communication builds closeness. Trust is your key to freedom. The way to build trust is through honesty and responsibility. Honesty means you don’t lie or manipulate(作假). Responsibility means that you are reliable(可依赖的) and make good choices to use good judgment. When your parents trust you, it’s a lot easier for them to say “Yes.”

These guidelines(指导方针) work both ways. If sometimes, your parents break any of these guidelines, talk to them about it. Pick a time when you are both calm and feeling good toward each other(never when you are angry). Then , explain to them what they did, how it makes you feel, and what you’d like them to do instead.

Unfortunately, these guidelines don’t always work. Since we can only control what we do, and not what our parents do, sometimes we just cannot change a bad relationship. If this is the case, try to use these guidelines to at least improve things a little, and talk with a trusted adult who may be able to help you

小题1:What’s the probable meaning of the underlined word” discount” in the first paragraph?

A.To think or say that something is not important or not true.

B.To disagree with somebody’s opinions.

C.To respect somebody’s opinions

D.To accept somebody suggestions.小题2:The main idea of the second paragraph is about_______

A.feelings

B.advice

C.closeness

D.communication小题3:From this passage we know that the writer may be________.

A.an editor

B.an expert

C.a doctor

D.a teacher小题4:The main purpose of the passage is_______.

A.to show that your parents want to know what’s going on in your life.

B.to discuss how to have great relationship with your parents.

C.to discuss how to talk with a trusted adult who may be able to help you

D.to discuss how to respect your parents.