跟质子、中子相比,电子质量很小,所以,原子的质量主要集中在原子核上,质子和中子的

题型:问答题

问题:

跟质子、中子相比,电子质量很小,所以,原子的质量主要集中在原子核上,质子和中子的质量跟相对原子质量相比较,均约等于1.所以,相对原子质量≈质子数+中子数,已知某一原子的相对原子质量为27,质子数比中子数少1,它的核电荷数为多少?

考点:原子结构原子的定义
题型:问答题

21岁女孩。1年前患者因舍友嘲笑自己体形较胖(66kg),觉得被同学笑话了,于是开始节食,早餐一片面包,午餐一份粥,晚餐不进食,开始还觉得饿,后来自我感觉不饿并且厌恶食物的味道,体重迅速下降至25kg,被学校强令休学。患者已出现闭经,身体无力,潮热,盗汗,极少进食。被家人带来入院。既往健康,无阳性家族史。

进行认知治疗时,除改变错误认知外,最好的措施是()

A.要求患者自觉按量进食

B.固定进食量,如违反就施以惩罚

C.为其制定进食计划,让其严格执行

D.顺其自然

E.共同制定进食计划,要求其执行,如目标达到,表扬或奖励

题型:问答题

女性,29岁,常规查体发现子宫颈糜烂样改变,接触性出血阴性。

下一步的诊治流程首选()

A.子宫颈分泌物培养

B.子宫颈细胞学检查

C.HPV检测

D.宫颈锥切术

E. * * 镜检查

题型:问答题

小明用如图甲所示的装置做“观察水的沸腾”实验.

(1)他为图中温度计写了一份使用说明书,其中有科学性错误的一条是______(填序号).

温度计说明书

①测量前,了解温度计的量程和分度值;

②测量时,温度计的玻璃泡与被测液体不一定要充分接触;

③待温度计的示数稳定后再读数,读数时温度计不可以离开被测液体;

④读数时,视线要与温度计中液柱的上表面相平.

(2)两组同学虽然选用的实验装置相同,但水开始沸腾的时刻不同,他们绘制的沸腾图象如图乙所示:a、b两种图象不同的原因是水的______不同.(选填“初温”、“密度”或“质量”)

(3)通过分析图乙,归纳出水沸腾的特点是:______.

(4)撤去酒精灯,小明观察到水没有立即停止沸腾,此时的温度______(选填“高于”、“等于”或“低于”)沸点.

(5)酒精灯火焰给水加热过程中,热量总是从高温物体传给低温物体,而不会从低温物体传给高温物体,说明能量的转移具有______性.

题型:问答题

《人民日报》载文强调,对于年轻一代,我们需要用灿烂历史和伟大成就来激发他们的爱国热情,同时更需要引导他们从点点滴滴做起,踏踏实实地沉下去,触摸我们脚下的这块土地。这表明,要加强自身修养,推进社会主义文化建设,就必须()

A.立足于中国特色社会主义实践

B.坚持以我为主,为我所用

C.脚踏实地、不尚空谈、重在行动

D.提高知识文化修养,加强思想道德修养

题型:问答题

Part of the debate about culture revolves around issues of perspective and ownership. Within a nation such (1) the United States—a nation whose cultural heritage includes elements from every corner of the world (2) are a great many perspectives coexisting and intertwining in the cultural fabriC.When we all ask (3) as individuals, "what belongs to me, to my culture " we are rewarded with a spectacular variety of (4) ; in this way, different perspectives and ownership of different cultural traditions enriches everyone. But when we ask " (5) belongs to us, to our culture " we ask a much harder question. Do the people of the (6) States, or of any culturally complex human society, necessarily share common cultural elements If so, who gets (7) decide what those elements are
This debate is a crucial one in many cultures throughout the world (8) . In the US, the debate promises to impact the way we educate our children—that is, (9) manner and shape in which culture reproduces itself—and the way we write our laws. In (10) countries, equally crucial issues are at stake.
For many people, what is at stake is the character (11) US national identity. Hirsch argues that this identity needs to become less culturally fragmented; others, like Walker, (12) that the national character gets its strength from cultural diversity, from the freedom (at home and in (13) ) to celebrate, honor, and reproduce different cultural traditions. Those who take this latter view follow the reasoning (14) Shweder, arguing that we need to accept that there are multiple valid cultural perspectives and that two (15) perspectives can both be valid even though they might contradict one another.
Recognize that the position you (16) in this debate about culture—whatever position you take—is a political one with implications (17) what we should value, what we should praise, what we should accept, what we should teach. When (18) reflect on this debate, when you contribute your own voice to the discussion, try to be (19) of the implications that follow from your position. When you listen to the voices of others, try to (20) with awareness, deciding for yourself what is at stake and how their positions relate to your own.

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