Even plants can run a fever, especially when they are under attack by insects or disease. But (21) humans, plants can have their temperature (22) from 3,000 feet away— straight up. A decade ago, (23) the infrared(红外线的)scanning technology developed for military purpose and other satellites, physicist Stephen Paley (24) a quick way to take the temperature of crops to determine (25) ones are under stress. The goal was to let farmer (26) target pesticide spraying (27) rain poison on a whole field, which (28) include plants that don’t have the pest problem.
Even better, Paley’s Remote Scanning Services Company could detect crop problem before they became (29) to the eye. Mounted on a plane flown at 3,000 feet (30) , an infrared scanner measured the heat emitted by crops. The data were (31) into a color-coded map showing (32) plants were running "fev
A. even if
B. if only
C. only if
D. though
{{B}}Human Ingenuity{{/B}} Since the dawn of human ingenuity, people have devised ever more cunning tools to cope with work that is dangerous, boring, burdensome, or just plain nasty. That compulsion has resulted in robotics—the science of conferring various human capabilities on machines. And if scientists have yet to create the mechanical version of science fiction, they have begun to come Close. As a result, the modern world is increasingly populated by intelligent gizmos whose presence we barely notice but whose universal existence has removed much human labor. Our factories hum to the rhythm of robot assembly arms. Our banking is done at automated teller terminals that thank us with mechanical politeness for the transaction. Our subway trains are controlled by tireless robo-drivers. A. fulfill delicate tasks like performing brain surgery B. interact with human beings verbally C. have a little common sense D. respond independently to a changing world [单项选择]没有()小康,就没有全面的小康。
A. 全民 B. 农民 C. 全国 D. 工人 [判断题]变电站、发电厂升压站发现有系统接地故障时,应进行接地网接地电阻的测量。()
A.正确 B.错误 [多选题]下列对于单位子单位分部工程的划分原则,哪些是正确的( )。
A.具备独立施工条件并能形成独立使用功能的建筑物及构筑物为一个单位工程 B.建筑规模较大的单位工程,可将其能形成独立使用功能的部分为一个子单位工程 C.子单位工程应按专业性质、建筑部位确定 D.当分部工程较大或较复杂时,可按材料种类、施工特点、施工程序、专业系统及类别等划分为若干子分部工程 E.单位工程是由若干分部工程组合而成 [多项选择]心理学研究的主要内容包括()。
A. 动机与情绪 B. 认知与学习 C. 心理特性 D. 心理发展与职业规划 [单选题] 甲预谋前往乙处杀害乙,但到达后发现乙处有人,感到无法下手,遂返回。
关于甲的犯罪形态,下列哪一选项是正确的?() A.犯罪预备 B.犯罪中止 C.犯罪未遂 D.不可罚的不能犯 [单项选择]
他们在天上,愿为一颗星。他们在地上,愿为一盏灯。不怕显得多么渺小,只要尽其可能。唯因不被承认才格外勇敢真诚,即使像眼泪一样跌碎,敏感的大地处处仍有持久而悠远的回声。——舒婷《献给我的同代人》这段优美的话语() A. ①② B. ①③ C. ②④ D. ③④ [单选题]10kV绝缘操作杆最小有效绝缘长度为()m。
A.0.7 B.0.4 C.0.8 D.0.5 E.略 F.略 [多项选择]赭石的性状特征有
A. 豆状、肾状集合体 B. 表面棕红色或灰黑色 C. 一面有圆形乳头状突起,习称“钉头” D. 气微,味淡 E. 断面凹凸不平或呈层状纤维样的结构 [判断题]高速公路双向四车道入口标线的设置,分界线实线段长度为渐变段与加速车道的长度之和。( )
A.正确 B.错误 [多选题]根据《电力系统安全稳定导则》,在正常运行方式下(含计划检修方式),系统中任一原件发生单一故障时,不应导致主系统非同步运行,不应发生频率崩溃和电压崩溃。其中任一原件指的是( )。
A.发电机 B.线路 C.变压器 D.母线 [单项选择]一条闭合水准路线,共有30个测点,实测高差约为-2.538米,其高差闭合差允许值约为()米。
A. +2.538 B. ±219 C. ±109 D. ±66 [单项选择]既能疏散风热.又能升阳举陷的药物是( )
A. 桑叶、菊花 B. 薄荷、牛蒡子 C. 升麻、牛蒡子 D. 蝉农、牛蒡子 E. 升麻、柴胡 [多选题] 1971年的全国教育会议,通过由张春桥、姚文元修改定稿的会议纪要,提出了所谓教育战线的“两个估计”。下列选项属于“两个估计”内容的是( )。
A.毛主席的无产阶级教育路线基本上没有得到贯彻执行 B.资产阶级专了无产阶级的政 C.各级学校的教育方式基本上是保守和无用的 D.大多数教师的世界观基本上是资产阶级的 [判断题]起重气垫的用途是升举扶正倒翻车辆,重物起升。有四种规格,升举能力和升举高度分别是5-48吨和200-1100毫米 ( )(易)
A.正确 B.错误 我来回答: 提交
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