热门试题:
[单项选择]毫无疑问，未成年人吸烟应该加以禁止。但是，我们不能为了防止给未成年人吸烟以可乘之机，就明令禁止自动售烟机的使用。这种禁令就如同为了禁止无证驾车在道路上设立路障，这道路障自然禁止了无证驾车，但同时也阻挡了99%以上的有证驾驶者。
为了对上述论证作出评价，回答以下哪个问题最为重要( )
A. 未成年吸烟者在整个吸烟者中所占的比例是否超过1%
B. 禁止使用自动售烟机带给成年购烟者的不便究竟有多大
C. 无证驾车者在整个驾车者中所占的比例是否真的不超过1%
D. 从自动售烟机中是否能买到任何一种品牌的香烟
[单项选择]对均质黏性土边坡，下述说法正确的是（）。
A. 滑动破坏时滑动面接近于直线
B. 抗滑力由内聚力及内摩擦力两部分组成
C. 滑坡体破坏时可形成较陡的滑坡后壁
D. 验算滑动稳定性时，可采用滑坡推力传递法
[单选题]在国外购买的机动车,其来历证明是________。
A.全国统一的机动车销售发票
B.该车销售单位开具的销售发票
C.该车销售单位开具的销售发票及其翻译文本
D.销售发票翻译文本
[单选题]ZD6系列电动转辙机摩擦联接器夹板弹簧各圈的最小间隙不能小于( ).
A.1mm
B.1.5 mm
C.2mm
D.2.5 mm
[判断题]在配电柜（盘）内工作，相邻设备应部分停电或采取绝缘遮蔽措施。
A.正确
B.错误
[单项选择]If a magnetic compass is not affected by any magnetic field other than the Earth’s，which statement is TRUE?（）.
A. Compass error and variation are equal
B. Compass north will be true north
C. Variation will equal deviation
D. There will be no compass error
[单选题]对差压变送器进行检测判断时,下列检测方法有误的是（）.
A.断路检测:将怀疑有故障的部分与其他部分分开来,查看故障是否消失; 如果消失,则确定故障所在,否则可进行下一步查找
B.短路检测:在保证安全的情况下,将相关部分回路直接短接,观察变送器输出,以判断导压管路的堵、漏的连通性
C.)替换检测:将未发现故障的部分进行更换,从而判断故障部位
D.分部检测:将测童回路分割成几个部分,按部分检查,由简至繁,由表及里，缩小范围,找出故障位置
[单选题] 在外界负荷不变的情况下,燃烧减弱时,汽包水位( )。单选
A. 上升
B. 下降
C. 先上升后下降
D. 先下降后上升
[单选题]主变压器容量为31.5MVA，10kV出线间隔数为12，10kV架空主干线截面为（）mm2。
A.240
B.150
C.95
D.70
[单选题]硅元素在钢铁中属于( )。
A.优质元素
B.有益元素
C.稀缺元素
D.不确定
[单项选择]恩格尔于1977年提出的现代医学模式是
A. 生物医学模式
B. 生物--社会医学模式
C. 生物--心理医学模式
D. 生物--心理--社会医学模式
E. 心理--社会医学模式
[多选题]关于变电站二级动火工作票的签发.审核和批准，以下做法正确的是（）。
A.由申请动火的工区动火工作票签发人签发
B.工区安监人员.消防人员审核
C.动火工区分管生产的领导或技术负责人（总工程师）批准
D.必要时还应报当地公安消防部门批准
[判断题]电磁阀有防爆型和普通型两种。( )
A.正确
B.错误
[单选题]二次雷达水平波束主瓣的宽度是（ ）度
A.1.2
B.1.45
C.2
D.2.45
[单项选择]
George Washington proclaimed a National Day of Thanksgiving in 1789, (36) some were opposed to it. There was (37) among the colonies, (38) feeling the hardships of a few Pilgrims did not (39) a national holiday. And (40) , President Thomas Jefferson laughed (41) the idea of having a day of thanksgiving.
(42) was Sarah Josepha Hale, a magazine editor, whose efforts eventually led to (43) we now recognize as Thanksgiving. Hale wrote many editorials championing her (44) in her Boston Ladies’ Magazine. (45) , after a 40-year (46) of writing editorials and letters to governors and presidents, Hale’s obsession became a (47) when, in 1863, President Lincoln proclaimed the last Thursday in November as a (48) day of Thanksgiving.
Thanksgiving was proclaimed by every president (49) Lincoln. The date was changed a (50) of times, mos
A. therefore
B. here
C. soon
D. later
[单项选择]下面哪一组氨基酸都是必需氨基酸( )
A. 赖氨酸、亮氨酸、胱氨酸
B. 赖氨酸、苯丙氨酸、酪氨酸
C. 苯丙氨酸、苏氨酸、缬氨酸
D. 苏氨酸、缬氨酸、甘氨酸
[简答题]设函数y=y(x)在(-∞，+∞)内具有二阶导数，且y’≠0，x=x(y)是y=y(x)的反函数．
试将x=x(y)所满足的微分方程[*]变换为y=y(x)满足的微分方程；
[单选题]有助于膀胱腹壁瘘区别于输尿管腹壁瘘的是前者为
A.导尿管插入膀胱，自导尿管注入美蓝，腹壁伤口排出蓝色液体
B.下腹压痛
C.低热
D.发生在盆腔手术后
E.下腹壁伤口渗尿
[单项选择]根据《中华人民共和国海运条例》，国际班轮运输的公布运价应当在执行前（）向交通部指定的专门机构备案。
A. 24小时
B. 48小时
C. 15日
D. 30日
[判断题]“外国法人在我国领域内进行的民事活动，必须符合我国的法律规定。”该条规定体现的是保护主义原则。
A.正确
B.错误
[单选题]扣缴义务人应当自扣缴义务发生之日起()日内向扣缴义务人所在地主管税务机关申报和解缴代扣税款。
A.5
B.7
C.10
D.15
[单选题]不符合红外检测仪器基本要求的选项是( )。
A.红外热像仪应操作简单，携带方便
B.测量精度和测温范围须满足现场测试要求
C.具有一般的温度分辨率和空间分辨率
D.不受测量环境中高压电磁场的干扰
[单选题]298、掘路施工应做好防止交通事故的安全措施。施工区域应用标准路栏等进行分隔，并有明显标记，夜间施工人员应佩戴反光标志，施工地点应加挂（）。[单选题]
A.A、照明灯
B.B、警示标志
C.C、警示灯
D.D、标示牌
[单项选择]在下列网络的传输介质中，抗干扰能力最好的一个是______。
A. 光缆
B. 同轴电缆
C. 双绞线
D. 电话线
[判断题]电解槽阴极室的纯水加入量随电流负荷的改变而改变。 ( )
A.正确
B.错误
[多选题]对运输鲜活农产品的罐式货车进行查验时需拍摄的照片包括( )、车头、车尾。
A. 行驶证照片
B. 车侧
C. 运单
D. 箱体标识照片
[单项选择]无动力托运机车应由司机随车回送，并备有信号器具和必要的（）、工具。
A. 冷却水
B. 油脂
C. 蓄电池
D. 制动砂
[单项选择]屈指肌腱在哪个部位损伤时，治疗效果往往不理想
A. 手指腱鞘内
B. 腕部
C. 在手掌内到远侧掌横纹止
D. 前臂部
E. 接近肌腱的止点处
[多选题]虚实结合法是一种将（）与景物介绍有机结合起来的讲解方法。
A.诗词
B.典故
C.故事
D.名言
E.传说
[单选题]如果楼层已着火燃烧,但楼梯尚未烧断,火势并不十分猛烈时,可以披上( ),从楼上快速冲下。
A.干的衣被
B.用水浸湿的衣物
C.塑料或麻的制品
[填空题]The nineteen twenties brought a feeling of freedom and independence to millions of Americans, especially young Americans. Young soldiers returned from the world war with new ideas. They had seen a (36) world in Europe. Many of these young soldiers were not (37) to quietly accept the old traditions of their families and villages when they returned home. (38) , they wanted to try new ways of living. Many young Americans, both men and women, began to (39) some of the traditions of their parents and grandparents. For example, some young women began to (40) with new kinds of clothes. Many young women began to smoke (41) , too. Many women also began to drink alcohol with men in public for the first time. And they listened together to a (42) new kind of music: jazz. An important force behind these changes was the growing independence of American women. In nineteen twenty, the nation passed the Nineteenth Amendment to t
[单项选择]患者，男，56岁。心前区疼痛，时发时止，痛时向左臂放射。应首先考虑的是
A. 胸膜炎
B. 自发性气胸
C. 肋间神经炎
D. 带状疱疹
E. 心绞痛
[单项选择]
Most episodes of absent-mindedness -- forgetting where you left something or wondering why you just entered a room -- are caused by a simple lack of attention, says Schacter. "You’re supposed to remember something, but you haven’t encoded it deeply."
Encoding, Schacter explains, is a special way of paying attention to an event that has a major impact on recalling it later. Failure to encode properly can create annoying situations. If you put your mobile phone in a pocket, for example, and don’t pay attention to what you did because you’re involved in a conversation, you’ll probably forget that the phone is in the jacket now hanging in your wardrobe (衣柜). "Your memory itself isn’t failing you," says Schacter. "Rather, you didn’t give your memory system the information it needed."
Lack of interest can also lead to absent-mindedness. "A man who can recite sports statistics from 30 years ago,
A. It helps us understand our memory system better.
B. It enables us to recall something from our memory.
C. It expands our memory capacity considerably.
D. It slows down the process of losing our memory.
[单项选择]翻箱机作用是将造好型的上下砂箱进行翻转，以便（）。
A. 下芯和检验
B. 浇注
C. 放置压铁
D. 进行落砂
[判断题]塞拉门锁闭方式：先锁闭保险锁、再锁闭电控锁。
A.正确
B.错误
[单项选择]Word的主要功能不包括_____。
A. 制作幻灯片
B. 制作表格
C. 图文混排
D. 格式化文档
