热门试题:
[单项选择]Even plants can run a fever, especially when they’re under attack by insects or disease. But unlike humans, plants can have their temperature taken from 3,000 feet away-straight up. A decade ago, adapting the infrared scanning technology developed for military purposes and other satellites, physicist Stephen Paley came up with a quick way to take the temperature of crops to determine which ones are under stress. The goal was to let farmers precisely target pesticide (杀虫剂) spraying rather than rain poison on a whole field, which invariably includes plants that don’t have pest (害虫) problems.
Even better, Paley’s Remote Scanning Services Company could detect crop problems before they became visible to the eye. Mounted on a plane flown at 3,000 feet at night, an infrared scanner measured the heat emitted by crops. The data were transformed into a color-coded map showing where plants were running "fevers". Farmers could then spot-spray, using 40 to 70 percent less pesticide than they o
A. estimate the damage to the crops
B. measure the size of the affected area
C. draw a color-coded map
D. locate the problem area
[单选题]矿井通风系统图必须标明 ( )的安装地点。
A.风流方向、避灾路线、防尘设施
B.风流方向、风量、通风设施
C.避灾路线、通风设施、防尘设施
D.风流方向、监测探头、通风设施
[单选题]1.35 在泥泞路段行车,要怎样控制速度,匀速一次性通过?
A.使用驻车制动器
B.踏下离合器踏板
C.踏制动踏板
D.用加速踏板
[多选题]电力网络包括(____)环节。
A.发电
B.变电
C.输电
D.配电
[多项选择]对会议有指导作用、反映会议主要精神的文件的是()
A. 重要文件
B. 开幕词
C. 工作报告
D. 会议决议
[单选题]平板阀具有浮动密封的特点,开、关到位之后均需要回转1/4-1/2圈,带省力机构的回转圈数按铭牌标识执行,无铭牌标注的回转( )圈。
A.3-4
B.1-2
C.4-5
D.5-6
[单项选择]人类感染恙虫病立克次体的最主要传播途径是
A. 节肢动物叮咬
B. 输血
C. 吸入气溶胶
D. 摄入污染食物
E. 母婴垂直传播
[单选题]现场勘察应查看现场作业需要停电的范围、保留的带电部位、装设接地线的位置、邻近线路、多电源、自备电源、地下管线设施和作业现场的条件、环境及其他影响作业的(),并提出针对性的安全措施和注意事项。
A.A.危险点
B.B.风险点
C.C.作业点
D.D.管控点
E.略
F.略
G.略
[单项选择]狂犬病疫苗及其被动免疫制剂应存放在()内。
A. 冷藏室
B. 冷冻室
C. 室温
D. 随意
[判断题] 带电作业时,如需在跨越处下方或邻近有电力线路或其他弱电线路的档内进行带电架、拆线的工作,则应制定可靠的施工方案,经本单位批准后,方可进行。
A.正确
B.错误
[多选题]对违反消防安全规定进入生产、储存易燃易爆危险物品场所的;违法使用明火作业或者在具有火灾、爆炸危险的场所违反禁令,吸烟、使用明火的,责令立即改正,处( )。
A.警告
B.罚款
C.十日以下拘留
D.十五日以下拘留
E.责令停产停业
[多选题] 下列( )装置与母线电压互感器有关。[1.0分]
A. 阻抗保护;
B. 检同期重合闸;
C. 方向保护;
D. 电流速断保护。
[简答题]所间区间的界限是如何划分的?《技规》(普)第308条
[单项选择]按年呑吐量算世界最大的港口是()
A. 纽约港
B. 神户港
C. 鹿特丹港
D. 上海港
[单选题]当经纬仪的视准轴与横轴不垂直时,望远镜绕横轴旋转时,其视准轴的轨迹面正确的是(____)
A.水平面
B.对顶圆锥面
C.对称抛物线
D.倾斜面
[单选题]下列属于体能训练必训内容的是( )。
A. 足球
B. 游泳
C. 爬山
D. 俯卧撑
[多选题] 个人在手机个税App上申请退税操作,资金一直未能入账,App上一直显示国库处理中,可能存在的原因有( )
A.退税信息还在税务系统,尚未传送至人行国库;
B.人行国库接收到退税信息后,通常需要2-3个工作日的处理期间;
C.国库处理失败,信息已退回税务系统,但App信息尚未更新;
D.个人账户的开户银行选择错误,导致国库处理失败。
[单项选择]食品水分测定,平衡样超差的原因不可能是()。
A. 样品处理不均匀
B. 烘箱未鼓风,温度不均匀
C. 样品冷却时间等条件不一致
D. 天平的灵敏度有变动
[单项选择]下列哪项是城市用地布局模式的核心要素
A. 路网形式
B. 城市形态
C. 空间结构
D. 城市意象
[单选题]对于烯烃来说下列反应中()是氧化反应。
A. R—CH=CH2+HCI→R-CH 2CH2CI
B. R—CH=CH2 +H2→RCH2CH3
C. R-CH=CH2 +02 →R-CH(OH)CH(OH)
D. R-CH=CH2→R-C三CH+H2
[单项选择]暂态稳定指电力系统受到()后,各同步电机保持同步运行并过渡到新的或恢复到原来稳定运行方式的能力。
A. 小干扰
B. 大干扰
C. 有功功率扰动
D. 无功功率扰动
[单项选择]It is easy to see why forgiveness is typically regarded as a virtue. Forgiveness is not always a virtue, however. Indeed, if I am correct in linking resentment to self-respect, a too ready tendency to forgive may properly be regarded as a vice because it may be a sign that one lacks respect for oneself. Forgiveness may indeed restore relationships, but to seek restoration at all cost--even at the cost of one’s very human dignity--can hardly be a virtue. And, in intimate relationships, it can hardly be true love or friendship either the kind of love and friendship that Aristotle claimed is an essential art of the human life. If I count morality as much as anyone else (as surely I do), a failure to resent moral injuries done to me is a failure to care about the moral value in my own person (that I am, in Kantian language, an end in myself) and thus a failure to care about the very rules of morality. To put the point in yet another way: If it is proper to feel indignation when I see third
A. Too ready to forgive is no more a real virtue than an evil.
B. The consistency between self-respect and forgiveness is important.
C. Rules of morality may guide the correct use of forgiveness.
D. Caring about others and oneself demands generous forgiveness.
[单项选择]The ______ problem of bring a space-ship back from the moon has been solved.
A. technical
B. technological
C. technique
D. technology
[单项选择]下列关于铂金制品征收增值税说法不正确的是( )。
A. 国内生产企业自产自销的铂金实行增值税即征即退政策
B. 出口铂金制品,对铂金原料部分的进项增值税不实行出口退税
C. 铂金出口不退增值税
D. 对进口铂金依法征收进口环节增值税
[单选题] 光纤通信的( )波长在0.8μm~1.8μm之间。
A.微波
B.声波
C.光波
D.电波
[简答题]用电信息采集系统数据采集失败且透抄电能表实时数据失败,应检查哪些方面?
[单项选择]
A. disposes
B. supports
C. opposes
D. despise
[单项选择]BrunnstromIII期手功能的主要表现是()
A. 能侧掐或拇指带动松开
B. 能全指屈曲,钩状抓握
C. 能随意全指伸开
D. 能进行球状抓握
E. 能进行各种抓握
[单项选择]检测细胞因子的ELISA法通常采用()
A. 双抗夹心法
B. 双位点一步法
C. 间接法
D. 竞争法
E. 捕获法
[单选题]高架库房室内消火栓系统最不利消火栓处充实水柱不得小于( )( 易 )
A.13m
B.15m
C.20m
D.30m
[简答题]根据给定资料,就破除高校行政化应做好哪方面的工作提出你的建议。
[要求] 建议合理可行,条理清晰,字数不超过300字。
[单选题]( )不属于防止线路爬行的措施。
A.加强轨道的中间扣件的扣压力和接头夹板的夹紧力
B.采用以防爬器和防爬支撑组成的防爬设备来共同抵抗钢轨爬行
C.安装轨距杆或轨撑
D.在线路上进行涂油
[判断题]在翻车机转动或矿车运行时,禁止任何人进入翻车机与车辆之间。
[单项选择]砂在进行泥块含量试验时,应对烘干的试样用()mm筛筛分,取筛上的砂备用。
A. 0.08
B. 0.63
C. 1.25
D. 2.50
[判断题]《空调列车服务质量规范》规定,硬卧宿营车旅客与乘务人员休息区之间以及乘务人员铺位每格有挡帘。
A.正确
B.错误