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 tran A. the lack of official support B. its high cost C. the lack of financial support D. its failure to help increase production [判断题]翻越障碍训练时,必须设置缓冲垫,在落点等处应当设置专人保护。( )(易)
A.正确 B.错误 [判断题]防灾安全监控系统的风监测子系统应具备大风监测报警、预警功能( )
A.正确 B.错误 [判断题]不计入办理治安案件期限的“鉴定期间”是指公安机关提交鉴定之日起至鉴定机构作出鉴定结论并送达公安机关的期间。
A.正确 B.错误 [单项选择]水泥混凝土路面施工中,水泥混凝土面板达到设计强度( )以后,方可允许行人通过。
A. 20% B. 30% C. 40% D. 60% [单选题]液压马达使用( )驱动。
A.电 B.压缩空气 C.液压油 [单项选择]在化工机器预防性维修体系中PM制是指()。
A. 计划预修制 B. 预防维修制 C. 预知维修制 D. 全员生产维修制 [单选题]《关于实施动车组列车互联网订餐工作的通知》中,列车配送人员依据列车餐食派送单分车厢依次派发餐食,应在( )分钟内将餐食发放完毕,派发时需通过车票或手机号核验旅客身份,派发结束后通过手持终端标记异常订单,无反馈信息订单视为正常订单。
A.30 B.20 C.40 D.15 [单选题]烘干温度一般为( )℃,不要调节得太高,以防把不耐高温的面料烘坏。
A.45 B.50 C.55 D.60 [判断题]铁路运输服务是指针对人体的服务。 ( )
A.正确 B.错误 [判断题]现场受理单位与施工负责人确认人员、工器具、特种作业凭证、施工负责人证、施工交底等施工准备情况满足施工条件后即可组织施工。
A.正确 B.错误 [判断题][228]局部维护涂装使用红丹防锈底漆时,钢表面清理应达到St3级或P St3级。
A.正确 B.错误 [判断题]废水中油类污染物存在多种形式,其中乳化油的粒径最小。
A.正确 B.错误 [多选题]使用锯轨机、打磨机等机具时,其他人员作业应注意( )。
A.A.应远离锯轨机两侧和前方,防止锯片碎裂伤人。 B.B.钢轨打磨时,其他人员应远离打磨前方。 C.C.焊补钢轨、辙叉时,电焊机应采取接地措施,防止人员触电灼伤。 D.D.钢轨焊接时,应严格按操作规程操作,防止烫伤。 [单选题]医院药事管理的发展阶段分为
A.古代阶段、近代阶段、现代阶段 B.原始阶段、古代阶段、现代阶段 C.古代阶段、过渡阶段、现代阶段 D.原始阶段、过渡阶段、现代阶段 E.传统阶段、过渡阶段、患者服务阶段 [简答题]简述明治维新的意义
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