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]列车进行摘、挂作业开车前不需要进行简略试验
A.正确 B.错误 [单选题] 下列药物除哪项外,均可引起便秘?( )
A.止痛药 B.5-HT3受体拮抗剂 C.长春碱 D.维生素 [判断题]快捷方式的删除与其他文件的删除最大的不同就是系统不会将它放入回收站,而是直接从磁盘上删除。
[单项选择]国标法规定,测定工作场所空气中甲苯的方法为()。
A. 热解吸-比色法 B. 热解吸-分光光度法 C. 溶剂解吸-分光光度法 D. 溶剂解吸-气相色谱法 E. 溶剂解吸-液相色谱法 [判断题]消防救援衔是表明消防救援人员身份、区分消防救援人员等级的称号和标志,是国家给予消防救援人员的荣誉和相应待遇的依据。
A.正确 B.错误 [单项选择]某患者男性,40岁,近日面色萎黄,口唇色淡,神疲乏力,心悸失眠,纳少,大便不成形,舌淡,苔白,脉细弱。查血常规提示缺铁性贫血。其中医辨证是()
A. 脾胃虚弱证 B. 心气亏虚证 C. 心脾两虚证 D. 心血亏虚证 E. 心肾两虚证 [单项选择]路面标线有( ),是直接在路面上用涂料喷刷或用混凝土预制块等铺列成线条、符号,与道路标志配合的交通管制设施。
A. 警告标线、指示标线、辅助标线 B. 警告标线、指示标线、禁止标线 C. 警告标线、指示标线、安全标线 D. 警告标线、禁止标线、辅助标线 [单项选择]患者,女,45岁,带下赤白夹杂,质粘无臭,阴部灼热,五心烦热,失眠多梦,舌红,少苔,脉细数,应属于
A. 脾虚 B. 肾阴虚 C. 湿热 D. 肾阳虚 E. 热毒 [单选题]钢轨组放在道心时。新轨组轨面不得高于线路上钢轨面( )
A.10mm B.15mm C.20mm D.25mm [多选题] 在技术方案投资备方现金流量表中,应作为现金流出的有 ( )。
A. 技术方案资本金 B. 实缴资本 C. 借款本金偿还 D. 经营成本 E. 租赁资产支出 [单选题]在气动系统中,用来连接以及对系统进行消音,冷却,测量等的一 些元件被称为( )
A.辅助元件 B.控制元件 C.动力元件 D.执行元件 [判断题]根据《信息安规》,禁止终端设备在管理信息内、外网之间交叉使用。
A.正确 B.错误 我来回答: 提交
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