试说明下列合金钢的名称及其主要用途。 W18Cr4V、5CrNiMo

题型:问答题 简答题

问题:

试说明下列合金钢的名称及其主要用途。 W18Cr4V、5CrNiMo

考点:材料科学机械工程材料机械工程材料题库
题型:问答题 简答题

—What's Zhang Peng doing?  

—_________.[ ]

A. No, he isn't    

B. Yes, he is   

C. He's having a picnic  

题型:问答题 简答题

胸部X线检查,肺门舞蹈征多见于哪种先心病

A.房间隔缺损
B.室间隔缺损
C.动脉导管未闭
D.法洛四联症
E.艾森曼格综合征

题型:问答题 简答题

B The Culture Debate in the US:Whose Culture Is This ,Anyway 美国的文化辩论:空间是谁的文化?
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.

题型:问答题 简答题

COPD病人上腹部术后易出现肺部并发症,最常见的诱发因素是()。

A.上腹部肌肉受损

B.循环不稳定

C.感染

D.引流不畅

E.膈肌功能受损和咳嗽受抑制

题型:问答题 简答题

根据构造和功能的不同,砂轮切割机分有单速型和双速型两种。

更多题库