热门试题:
[判断题]2.23申请注册登记的,不属于经海关进口的机动车和国务院机动车产品主管部门规定免予安全技术检验的机动车,应当提交机动车安全技术检验合格证明。
A.正确
B.错误
[多项选择]可以提高模具耐磨粒磨损性能的措施有()
A. 提高模具材料的硬度
B. 改善模具结构
C. 进行表面耐磨处理
D. 及时清理模具表面
E. 在模具表面涂润滑剂
[不定项选择题]共用题干
Adaptation of Living Things
Certain animals and plants develop characteristics that help them cope with their environ-ment better than others of their kind.This natural biological process is called adaptation.Among the superior characteristics developed through adaptation are those that may help in getting food or shelter,in providing protection,and in producing and protecting the young. That results in the evolution of more and more organisms(生物体)that are better fitted to their environments.
Each living thing is adapted to its way of life in a general way,but each is adapted especially to its own distinct class.A plant,for example,depends upon its roots to fix itseff firmly and to absorb water and inorganic chemicals(无机物).It depends upon its green leaves for using the sun's energy to make food from inorganic chemicals.These are general adaptations,common to most plants .In addition,there are special adaptations that only certain kinds of plants have.
Many animals have adaptations that help them escape from their enemies.Some are hidden by their body color or shape,and many look like a leaf or a little branch.The coats of deer are colored to mix with the surroundings.Many animals have the ability to remain completely still when an enemy is near.
Organisms have a great variety of ways of adapting. They may adapt in their structure,func- tion,and genetics;in their development and production of the young;and in other respects.An organism may create its own environment, as do warm-blooded mammals(哺乳动物),which have the ability to adjust body heat exactly to maintain their ideal temperature despite changing weather. Usually adaptations are an advantage,but sometimes an organism is so well adapted to a particular environment that if conditions change,it finds it difficult or impossible to readapt to the new conditions.
In the first paragraph,the word"environments"could best be replaced by______.
A.contexts
B.surroundings
C.neighbors
D.enemies
[多选题]加工用的( )( )( )等用后应及时清洗消毒,定位存放,食品工具容器不得落地放置,以防止食品受到污染
A.工具
B.容器
C.炊具
D.汤桶
[单选题]发电机转子穿装方法不包括( )。
A.滑道式方法
B.接轴方法
C.液压顶升方法
D.用两台跑车的方法
[单选题]输气站钢制放空竖管底部(包括金属固定绳)和其他利用金属壳体作为接闪器的设备,其底部应至少有( )处接至接地体。
A.1
B.2
C.3
D.4
[填空题]铁总运2015-191号-关于印发《普速旅客列车车门管理规定》的通知中,结合部管理,机后第一辆载客车厢前端车门或尾部载客车厢后端车门不得作为旅客 车门。
[判断题]安全绳连接器表面光滑,无裂纹、褶皱,边缘圆滑无毛刺,无永久性变形和活门失效等现象。()
A.正确
B.错误
[单选题]确保到______我国现⾏标准下农村贫困⼈⼝实现脱贫,贫困县全部摘帽,解决区域性整体贫困,做到脱真贫、真脱贫
A.⼆〇三〇年
B.⼆〇⼆〇年
C.⼆〇⼆五年
D.⼆〇三五年
[单选题]启备变的MR型有载分接开关有操作三种方式:DCS遥控操作、就地电动操作和就地手动。一般采用( )方式。数字上升(1至17)可( )6kV母线电压。
A.DCS遥控操作,提高
B.就地电动操作,降低
C.DCS遥控操作,降低
D.就地手动,提高
[简答题]按钮防护帽使用完毕后,必须存放在专用塑料盒内,放置在TD单元台顶部平台上,严禁随意摆放或丢弃。
[单选题]营业机构对银行卡跨行差错业务挂账处理中的应收款项处理期限原则上不得超过()。
A.10天
B.15天
C.1个月
[单选题]密切观察存有爆炸危险的现场情况,减少一线作业人员,保持足够安全距离,发现危险征兆应()。
A.应实施防爆措施
B.应迅速撤离
C.应向上级汇报
D.应提前准备灭火
[多选题](类别:号段管理 难度:中等)5G网络将赋予网联无人机超高清图视频传输(50-150Mbps)、()、()和自主飞行(100kbps,500ms)等重要能力,( )
A.低时延控制(10-20ms)
B.远程联网协作
C.高时延控制(10-20ms)
D.低程联网协作
[单项选择]哪种图像对肝的解剖结构显示较好?()
A. T1WI
B. T2WI
C. PDWI
D. 压脂像
E. 压水像
[单选题]单相变压器电源电压不变,负载电阻增大,原边电流( )。[321010101]
A.增大
B.减小
C.不变
D.不一定
[单项选择] You work as a database administrator for Certkiller .com. As a result of performance analysis, you created an index on theprod_namecolumn of the Certkiller prodtable, which contains about ten thousand rows. Later, you updated a product name in the table. How does this change affect the index?()
A. A leaf will be marked as invalid.
B. An update in a leaf row takes place.
C. The index will be updated automatically at commit.
D. A leaf row in the index will be deleted and inserted.
E. The index becomes invalid when you make any updates
[单项选择]政府还贷公路的收费期限最长不得超过()年。
A. 10年
B. 15年
C. 20年
D. 30年
[单项选择]杂醇油是一种有害的物质,存在于()
A. 油脂
B. 动物油
C. 植物油
D. 蒸馏酒
E. 发酵酒
[单选题]断路器(开关)与隔离开关(刀闸)无机械或电气闭锁装置时,在拉开隔离开关(刀闸)前应( )
A.确认断路器(开关)操作电源已完全断开
B.确认断路器(开关)已完全断开
C.确认断路器(开关)机械指示正常
D.确认无负荷电流
[单选题]下列防火卷维护管理的做法中,不符合现行国家标准《防火窗施工及验收规范》(GB 50877)的是( )。
A.每周手动启动防火卷帘内外两侧控制器上的控制按钮,检查下降、停止功能
B.每月手动操作防火卷帘手动速放装置,检查防火卷帘依靠自
C.每季度手动操作防火卷帘的手动拉链,检查防火卷帘的手动升降
D.每周检查防火卷帘下部是否存在影响下降的障碍物
[多项选择]自年度资产负债表日至财务会计报告批准报出日之间发生的下列事项中,属于非调整事项的有()。
A. 已确定获得其他公司赔偿20万元
B. 子公司发生重大损失
C. 发行公司债券2000万元
D. 董事会提出合并子公司决议
[单选题]( )工作前要对工作班成员进行危险点告知、交代安全措施和技术措施,并确认每一个工作班成员都已知晓
A.工作票签发人
B.工作负责人
C.工作许可人
D.专责监护人
[单项选择]When the writer first went to the Red Cross clinic in Beijing to donate his blood he was surprised ______.
A. how he was treated by the people there
B. what a good habit blood donation is
C. that donors only gave 200 ml each time in China
D. that most Chinese people were willing to donate blood
[判断题]测量电力通信信号,应在仪表量程范围内进行。
A.正确
B.错误
[单选题]发电车车烟火报警装置动态技术检查时,目视检查显示屏显示信息,显示日期、时间准确,误差不超过( )分钟。
A.1
B.2
C.3
D.4
[单项选择]有一国产石材,选用那种加工设备加工普形毛板最为经济()
A. 砂锯
B. 圆盘锯
C. 红外线桥切机
D. 绳锯
[单选题]24.最常见的急性肾衰竭类型为
A.急性肾间质病变
B.急性肾小管坏死
C.肾小球病变
D.肾小血管病变
E.肾皮质损害
[判断题]需求法则表明,需求量大小与商品价格高低呈正相关关系。()
A.正确
B.错误
[单选题]在生产、分配、交换、消费的相互关系中,起决定作用的是( )
A.生产
B.分配
C.交换
D.消费
[填空题]针对具体项目的管理性科技文件应放入所针对的项目文件中,按( )或( )组卷。( )
[单选题]土耳其人喜欢喝( ),饮茶是土耳其一道颇具特色的生活景观。
A.加香红茶
B.草莓红茶
C.苹果红茶
D.加糖红茶
[单选题]某餐饮服务企业(增值税一般纳税人)符合加计抵减应纳税额的销售额比例条件。2020年4月该企业取得不含增值税销售额300万元,购进货物取得增值税专用发票注明税额10万元(在当月申报抵扣)。该企业3月末加计抵减额余额为1万元。根据增值税法律制度的规定,该企业当月应纳增值税( )万元。
A.8
B.6.5
C.6
D.5.5
[单项选择]正常脑脊液中免疫球蛋白含量最高者为()
A. IgA
B. IgD
C. IgG
D. IgE
E. IgM
[单选题]循环球式转向器中的转向螺母可以( )。
A.转动
B.轴向移动
C.A,B均可
D.A,B均不可
[判断题]( )户外户内电缆终端头的制作工艺工基本相同,所以可以互换作用。
A.正确
B.错误