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Special Bridges Help Animals Cross the Road — Reported by Sheila Carrick Why did the chicken cross the road? To get to the other side. Most people know this joke. But recently, some people have been much more worried about how the grizzly bear(灰熊)and mountain lion can cross the road. 'Millions of animals die each year on US roads,' the Federal Highway Administration reports. In fact,only about 80 ocelots, an endangered wild cat, exist in the US today. The main reason? Road kill. 'Ecopassages (生态通道 ) ' may help animals cross the road without being hit by cars. They are paths both over and under roads. 'These ecopassages can be extremely useful, so that wildlife can avoid road accidents,' said Jodi Hilty of the Wildlife Protection Society. But do animals actually use the ecopassages? The answer is yes. Paul Beier of Northern Arizona University found foot marks left by mountain lions on an ecopassage that went under a highway. This showed that the lions used the passage. Builders of ecopassages try to make them look like a natural part of an area by planting trees on and around them. Animals seem to be catching on . Animals as different as salamanders(火蜥蜴) and grizzly bears are using the bridges and underpasses. The next time you visit a park or drive through an area with a lot of wildlife, look around. You might see an animal overpass! 小题1:The writer uses the example of 'ocelots ' to show that ________. A.wild animals have become more dangerous B.the driving conditions have improved greatly C.the measure for projecting wildlife fails to work D.an increasing number of animals are killed in road accidents 小题2: From the news story, we know an ecopassage is ________. A.an underground path for cars B.a fence built for the safety of the area C.a bridge for animals to get over a river D.a path for animals to cross the road 小题3: When the writer says that animals seem' to be catching on', he means ________. A.animals begin to realize the dangers on the road B.animals begin to learn to use ecopassages C.animals are crossing the road in groups D.animals are increasing in number 小题4: The writer asks visitors and drivers to look around when traveling because________ A.wild animals may attack cars B.wild animals may jam the road C.they may see wild animals in the park D.they may see wild animals on ecopassages
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【多选题】下列物质中与葡萄糖有氧氧化过程有关的有
A.
O 2
B.
SO2
C.
H 2 O
D.
Pi
E.
ADP
F.
ATP
【简答题】电阻上的电流与它两端的电压之是常数,这种电阻称为[ ]电阻。A. 线性
【单选题】下列关于人体有氧呼吸与无氧呼吸的比较,正确的是 [     ]
A.
二氧化碳只是有氧呼吸的产物
B.
葡萄糖只能作为有氧呼吸的底物
C.
还原态氢只在有氧呼吸过程中产生
D.
无氧呼吸和有氧呼吸都在细胞质基质中氧化分解丙酮酸
【简答题】葡萄糖是生命活动中不可缺少的物质,它在人体内能直接参与新陈代谢过程。 部分性质 生理作用 葡萄糖 化学式: C 6 H 12 O 6 白色结晶或颗粒状粉末,味甜;易溶于水;具有还原性,葡萄糖溶液与新制氢氧化铜悬浊液反应生成砖红色沉淀 葡萄糖为机体所需能量的主要来源,能促进肝脏的解毒功能,对肝脏有保护作用 请参与下列问题的讨论: (1)葡萄糖中碳、氢、氧三种元素的质量比为 。 (2)某兴趣小组的同学...
【简答题】已知一对正确安装的标准渐开线正常齿轮的ɑ=200,m=4mm,传动比i12=3,中心距a=144mm。试求两齿轮的齿数、分度圆半径、齿顶圆半径、齿根圆半径。
【简答题】电阻上的电流与它两端的电压之是常数,这种电阻称为____电阻。
【简答题】已知一对正确安装的标准渐开线正常齿齿轮的ɑ=20°,m=4mm,传动比i=3,中心距a=144mm。 试求两齿轮的齿数、分度圆直径。
【简答题】已知一对正确安装的标准渐开线正常齿制齿轮的ɑ=20 0 ,测得其中心距为180mm.两齿轮的齿数分别为Z1=24,Z2=48,。试求两齿轮的模数和小齿轮的分度圆半径、齿顶圆半径、齿根圆半径。
【判断题】公式可以写成,因此可以说导体的电阻与它两端的电压成正比,与通过它的电流成反比。( )
A.
正确
B.
错误
【单选题】如图是某绿色植物体内以葡萄糖作为底物的有氧呼吸过程模式图,1~8表示相关物质。下列说法不正确的是()
A.
催化1→2反应的酶存在于线粒体的基质中
B.
4和7为同一种物质,在活细胞中含量最高
C.
6可以来自叶绿体,3可以提供给叶绿体
D.
产生8最多的是5与6之间的反应
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