阅读理解Colourhelpsyouseethings.Butmanandsomemonkeysandapes(猿)aretheonlymammals(哺乳动物)thatcanseecolour.Toanyothermammalsuchasthedogtheworldlookslikeablack-and-whitephoto.Dogs
阅读理解
Colour helps you see things. But man and some monkeys and apes (猿)are the only mammals (哺乳动物) that can see colour. To any other mammal such as the dog the world looks like a black-and-white photo. Dogs hunt mainly by listening and sniffing (闻).
Like other animals dogs see best when things move. The animals they hunt seem to know this. A hunted rabbit or deer will “freeze”. Then the dog may not see it at all.
Birds can see colour. They need to because they fly and need to find places to land.Colour helps them judge distance and shape. In this way they are able to catch bugs (昆虫) in the air or to light on branches.
Some birds see things even better than you do. The birds that eat bugs can see them from far away. And even a very young bird can see a hawk high in the sky. So sharp eyes and a sense of colour help birds find food and also help them find where their enemies are.
(1)________can see colour.
[ ]
A.All the animals
B.All the mammals
C.Man and dogs
D.Birds and monkeys
(2)In order to find their food dogs mainly use their _______
[ ]
(3)The word “freeze” in the passage means _________.
[ ]
A.the hunted animals are frozen on the ground because of cold weather
B.the hunted animals' temperature is becoming lower and lower until it drops below 0℃
C.the hunted animals will stop running and stay in the same place without movement
D.the hunted animals are so frightened that they can't move any longer
(4)Colour helps birds_______
[ ]
A.see better than man
B.see better than dogs
C.see how colourful the world is
D.see clearly where food and enemies are
(5)To dogs they see best when things are ________
[ ]
已知:2Zn(s)+O2(g)=2ZnO(s)△H=-701.0kJ/mol2Hg(l)+O2(g 2020-04-07 …
已知:2Zn(s)+O2(g)=2ZnO(s)ΔH=−701.0kJ⋅mol−1;2Hg(l)+O 2020-04-07 …
已知:2Zn(s)+O2(g)=2ZnO(s)ΔH=−701.0kJ⋅mol−12Hg(l)+O2 2020-04-07 …
已知:(1)2Fe(s)+O2(g)=2FeO(s)△H=-544kJ·mol-1(2)2Al(s 2020-04-07 …
一个球从地面上竖直向上弹起时的速度为10m/s,经过t(s)时球的高度为h(m).已知物体竖直上抛 2020-05-14 …
已知:Fe2O3(s)+3C(石墨)==2Fe(s)+3CO(g),△H=+489.0kJ·mol 2020-06-27 …
已知热化学反应方程式:Zn(s)+1/2O2(g)=ZnO(s)△H=-351.5kJ/mol;H 2020-07-09 …
(1)已知:25℃、101kPa时,Mn(s)+O2(g)===MnO2(s)ΔH=-520kJ·m 2020-11-01 …
请问自动控制原理中C(s)/R(s)是开环传递函数还是闭环传递函数?看到书上有说G(s)=C(s)/ 2020-11-24 …
英语:下1.将下联打乱的字母组成单词,并写出汉语意思1.a,e,h,g,c,n[]2.e,i,s,t 2020-12-10 …