Most musicians agree that the best violins were made in Cremona, Italy, about 200 years ago. These violins sound better than any others. They even sound (21) violins made today. Violin makers and scientists try to make (22) like the old Italian violins. (23) they aren’t the same, Musicians prefer the old ones. No one really knows (24) these old Italian violins are so special, (25) many people think they have an answer.
Some people think it is the age of the violins. But not all old violins sound wonderful. Only the old violins from Cremona are (26) .
Other people think that the (27) to those violins is the wood. The wood of the violin is very important. It must be from certain kinds of trees. It (28) too young or too old. Perhaps the violin makers of Cremona knew (29) special about wood for violins.
But the kind of wood may not be (30) important. (31) may be more important t
A. either
B. neither
C. too
D. nor
| Social scientists distinguish between
what are known as treatment effects and selection effects. The Marine Corps, for
instance, is largely a treatment-effect institution. It is confident that the
experience of undergoing Marine Corps basic training will turn you into a
formidable soldier. A modeling agency, by contrast, is a selection-effect
institution. You do not become beautiful by signing up with an agency. At the heart of the American obsession with the Ivy League is the belief that schools like Harvard provide the social and intellectual equivalent of Marine Corps basic training—that being taught by all those brilliant professors and meeting all those other motivated students and getting a degree with that powerful name on it will confer advantages that no local state university can provide, and even an Ivy League A. not have a rich family B. be more confident C. not want to leave their parents D. have more old friends [判断题]监护人只能由一人充当， 不能为数人。
A.正确 B.错误 [填空题]朗讯ISM设备中，PPC的功能是指针处理和（）
[判断题]随着他人概念的发展，在儿童期的儿童对自己和他人的关系认识也变的很充分。
[单项选择]在自动化线上，下列哪种切屑类型是比较好的屑形（）
A. 长紧卷屑 B. 发条卷屑 C. 宝塔状卷屑 D. 带状屑 [单选题]消防控制室防火设计要求较高,通常设置在建筑物的( )。(易)
A.首层 B.二层 C.顶层 D.地下二层 [单选题]以下对断路器的描述不符合《标准化设计及原则》要求的是()。
A.三相不一致保护功能宜由断路器本体机构实现，即“断路器的问题断路器自己解决” B.每个断路器应且只应使用一套防跳回路 C.发电机、变压器和母联的断路器没有分相操作的需求，应优先选用三相联动的断路器 D.线路、变压器、发电机组断路器或机端断路器的三相不一致保护均不应启动失灵 [判断题]电动消防排烟机均可以在易燃易爆场所使用。( )
A.正确 B.错误 [单选题]ZPW-2000A型无绝缘移频自动闭塞信号机安装需要满足建筑接近限界要求，安装在距发送端调谐单元中心（ ）位置。
A.小于或等于1000mm、大于或等于1200mm B.大于或等于1000mm、大于或等于1200mm C.大于或等于1000mm、小于或等于1200mm D.小于或等于1000mm、小于或等于1200mm [单项选择]锤式破碎机启动前，应检查（）、破碎腔及传动部位，确认无异物后，再将上盖压紧。
A. 煤样接斗 B. 漏斗 C. 加料斗 D. 弹簧 [填空题]内燃机是燃料在气缸___产生热能并对外作功的机器。
[判断题]运行中的电力通信系统包括“运行”和“检修”的通信系统。
A.正确 B.错误 [单选题]生产经营单位与从业人员订立的劳动合同，应当载明有关保障从业人员( )、防止职业危害的事项，以及依法为从业人员办理工伤保险的事项。
A.养老保险 B.工伤保险 C.劳动安全 D.失业保险 [单选题]不恰当提问的消极作用是( )
A.可造成互相依赖和责任转移 B..容易使咨询师产生防御心理 C..可减少对方自我探索的主动性 D..可产生不准确信息而延误确诊 [单选题]在220kV设备上间接作业，此时人体就会积蓄一定电荷，如果人体偶然碰到接地体上，这些电荷就会形成电击电流，会使人体产生刺痛感。间接作业中要想消除由于静电感应引起的电击，唯一的办法就是穿（ ）。
A.绝缘服 B.绝缘手套 C.导电鞋 D.绝缘鞋 我来回答: 提交
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