搜题请搜索小程序“爱下问搜题”
问题 单项选择题 B型题

在磁共振基本原理中，“人体在MR机磁体内可产生一个沿外磁场纵轴（Z轴）方向的总磁矩”属于（）

A.弛豫

B.纵向磁化

C.横向磁化

D.纵向弛豫时间（T1）

E.横向弛豫时间（T2）

答案

参考答案：B

选择题

2013年4月20日，四川省雅安市芦山县发生7.0级地震，我们常德也有震感。一旦地震来临，正确的做法应该是

①在室内，迅速躲到墙角或坚固的家具旁  ②在室外，撤离到空旷安全的地方  ③在街上，快速跑进建筑物  ④在室内，立刻躲到厕所、厨房

A．①②③

B．②③④

C．①②④

D．①③④
查看答案
填空题

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.
查看答案