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[多选题]3D打印技术已是全球最受关注的新兴技术之一,该技术学名为“快速成型技术”。下列关于3D打印技术的说法正确的是()。
A.3D打印技术通过摒弃生产线而降低了成本,大幅减少了材料浪费
B.3D打印技术出现在上世纪90年代中期,实际上是利用光固化和纸层叠等方式实现快速成型的技术
C.人们利用3D打印技术可以制造出传统生产技术无法制造出的外形
D.3D打印技术需要承担的花费比较低廉

热门试题:

[多项选择]理财顾问服务具有的特点是( )。
A. 专业性
B. 制度性
C. 长期性
D. 综合性
E. 顾问性
[简答题]曲线轨距应根据曲线半径大小按规定的标准在内股加宽,R<195m,加 宽 值为 mm。
[单项选择]房颤、房扑的复律治疗可选用( )。
A. 奎尼丁
B. 利多卡因
C. 普萘洛尔
D. 维拉帕米
E. 阿托品
[判断题]炎症的基本病理变化是病变组织的变质、渗出和增生。( )
A.正确
B.错误
[判断题]故意杀人,一律处10年以上有期徒刑、无期徒刑或者死刑
[判断题]执行政府定价或者政府指导价的,逾期付款的,遇价格上涨时,按照新价格执行;价格下降时,按照原价格执行。( )
[多项选择]保险合同的辅助人包括()。
A. 被保险人
B. 受益人
C. 保险代理人
D. 保险经纪人
E. 保险公估人
[单项选择]工程建设项目的合同管理制度对于保证合同的顺利履行是十分重要的,主要制度不包括()。
A. 合同责任制
B. 合同管理章程
C. 专家评议制度
D. 合同文档系统
[单选题]RM80清筛车与捣固车的车轴箱均采用( )与车轴连接,以承受交变载荷。[323030102]
A.滑动轴承
B.关节轴承
C.直接连接
D.滚动轴承
[判断题](466460)( )有机溶剂常降低有色化合物的离解度,从而降低显色反应的灵敏度。(1.0分)
A.正确
B.错误
[填空题]
Directions:This section consists of three groups of pairs listed in two columns, A and B. You are to match the one marked 1), 2), 3), 4) or 5) in Column A with the one marked a, b, c, d or e in Column B. One point is given to each pair you match.
1) ______ Hermann Paul
2) ______ Hymes
3) ______ Brunner
4) ______ Widdowson
5) ______ M.D. Berlitz
a) communicative competence
b) views of forms and their communicative values
c) discovery method
d) neogrammatical theory
e) Berlitz Method

[单项选择]1岁男孩,发热、咳嗽3天,不喘。双肺少量中小水泡音。胸片示双下肺野点片状阴影,可能诊断
A. 青霉素
B. 红霉素
C. 20%甘露醇
D. 肾上腺皮质激素
E. 西地兰
[单选题]甲公司为国有独资公司,其董事会作出的下列决议中,符合《公司法》规定的是()。
A.聘选张某为公司经理
B.增选王某为公司董事
C.批准董事林某兼任乙有限责任公司经理
D.决定发行公司债券500万元
[单选题]《煤矿安全规程》规定,作业场所的噪声,不应超过85dB( ),大于85dB( )时,需配备个体防护用品;大于或等于( )时,还应采取降低作业场所噪声的措施。 (单选题)
A.88dB()
B.90dB()
C.94dB()
[多选题]动车组车轮踏面硌伤超限、受电弓击打损伤、配件脱落等信息须按要求由动车所直接报总公司运输局。
A.正确
B.错误
C.a.总公司运输局
D.b.总公司机辆部
E.c.总公司劳卫部
[填空题]
{{B}}Jackson:{{/B}}
Viewed from a scientist’s standpoint, all of the energy contained in fuel either now or in the future becomes heat. Some of the heat is used directly or produces useful work. The rest is lost or rejected. That is to say, it is radiated into the atmosphere from the engines, motors, furnaces, power lines, television sets, boilers and all the other energy-consuming machinery that makes our wheels go around.
{{B}}Browning:{{/B}}
It is necessary to improve the efficiency with which we use energy in order to do more work. But improvement cannot come overnight, and there are limits beyond which not even science can help. According to the Center for Strategic and International studies, about three quarters of the energy we use to move things, including ourselves, accomplishes no useful work.
{{B}}Jeffry:{{/B}}
In terms of efficiency, buses, trains, and other forms of public transportation may be using energy more
[单选题]股疝容易嵌顿的原因是、
A.股管过长、
B.隐静脉裂孔的镰缘锐利、
C.股鞘坚硬、
D.股环的韧带结构不易延伸、
E.股血管的压迫
[判断题]泡沫灭火器可用于带电灭火。
A.正确
B.错误
[单项选择]当遇到深度访谈的场所或对问题所知不多时常用
A. 专题调查
B. 定量调查
C. 半定量调查
D. 定性调查
E. 以上都不是
[单项选择]在购买计算机时,“Pentium Ⅱ300”中的300是指
A. CPU的时钟频率
B. 总线频率
C. 运算速度
D. 总线宽度
[单选题]马克思关于流通中货币量理论的假设条件是()。
A.完全的金币流通
B.完全的纸币流通
C.金币流通为主
D.纸币流通为主
[填空题]{{B}} Are Families Necessary {{/B}} As human children are unusually{{U}} (1) {{/U}}for an unusually long time, it’ s obvious that every society must provide a domestic context fur the children. The problem is that we assume that the family ought to be the same as the family considered as parents and children. In present day English, "family" has two meanings: 1. the{{U}} (2) {{/U}}group of parents and children; 2. a{{U}} (3) {{/U}}of relations, for example, the set of people who might be expected to turn up at a wedding or a funeral. Despite some modifications over the last century, the wife is still presumed to be very much the{{U}} (4) {{/U}}in a marriage, his normally the wife’s career that has to be reshaped to fit the husband’s, not the other way round. The dependence of children on their mother is exploited in a wholly unreasonable way to make the wife-mother the slave of the household. This is all tied up with the fact that, in
[单项选择]关于MRU,以下哪项是错误的()
A. 无需造影剂和插管而显示肾盏、肾盂、输尿管的形态和结构
B. 是了解上尿路梗阻的无创检查
C. 可以显示含尿液的尿路结构,其图像如同排泄性尿路造影
D. 有起搏器或金属支架的病人可检查
E. 新型多排螺旋CT尿路成像(CTU)可与其媲美
[填空题] 转K2型转向架检修时,同一转向架同组转向减振弹簧,同规格的摇枕弹簧自由高度差均不大于( )
[单选题]严禁在( )上行走。
A.路肩
B.道心、枕木头
C.人行道
D.道砟
[单选题]307.带电拆除绝缘子绑扎线时应边拆边卷,绑扎线的展放长度不得大于( )m。
A.0.1
B.0.2
C.0.3
D.0.4
[多选题]、依法行政对公安机关的基本要求包括( )。
A.合法行政
B.合理行政
C.程序正当
D.高效便民
[多选题]以下属于起重机选用基本参数的是(  )。
A.吊装载荷
B.额定起重量
C.最大幅度
D.最大起升高度
E.吊装安全距离
[单项选择]

A budget(预算) is a spending plan. It can help you spend money wisely. It can do this by cutting out wasteful spending. Of course, preparing a budget takes planning, and following a budget takes willpower. Your budget should meet your family’s needs and income.
The first step in creating a budget is to set your goals. What does your family need and want You must know this to work out the details of the budget. Keep goals realistic, in terms of income available. Then decide which goals are the most important.
The next step is estimating family income. Before you can plan wisely, you need to know how much money you have to spend! Write down all the money you expect to receive during the planned budget period.
After you have calculated how much money will be available, it is time to estimate expenses. List all of your family expenses. If you are not satisfied with what you got for your money, look carefully at your spending.
It is also a good idea
A. the meaning of a budget
B. the relations between budget and income
C. the way a budget is made
D. the importance of making a budget

[单选题]人民检察院依照法律规定独立行使( ),不受行政机关、社会团体和个人的干涉。
A.审判权
B.检查权
C.检察权
D.监督权
[判断题]对于持《往来港澳通行证》前往香港的中国公民,边检机关查验其有效的《往来港澳通行证》和香港入境事务处签发的进入许可无误后放行。(  )
A.正确
B.错误
[单选题]、对于新制造的、新安装的、改造和大修的起重机械在初次使用之前及起重机械发生重大设备事故之后的再次使用应进行()试验。单选
A.空载
B.静载
C.动载
D.载荷起升能力
[填空题]耐火度是指耐火材料在高温作用下而()的性能。
[简答题]假设该车价值30万元,质押权人、抵押权人、留置权人均要优先以该车受偿,应如何处理
[单项选择]患者,男性,34岁,半个月前因倒一盆水引起腰痛,二天后加剧,并出现小腿外侧痛,弯腰,咳嗽及用力排便时加重。查体:脊柱侧弯,椎旁叩痛并向右腿放射,右直腿抬高试验阳性,X线片见腰椎骨质有增生,首选诊断是()
A. 腰部扭伤
B. 腰椎结核
C. 腰椎间盘突出症
D. 腰肌劳损
E. 退化性腰椎痛
[单选题]3.1250. 作业时,工作负责人、( )要始终在工作现场,对工作班人员进行全过程监护,及时纠正不安全行为。
A.专责监护人
B.工作许可人
C.工作票签发人
D.分管领导

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