根据第一段中的"What do turtles, chickens and crocodiles have in common" "they all lay eggs"可知答案为 A 57.C 【解析】 代词指代题。 根据画线词前的 "Scientists study what they left behind after they died. These include their bones, teeth and more"可推知,此处them指代的是恐龙死后留下来的...
Animal动物的腿How many legs do you have? Of course we have two legs. What about animals? Do all the animals have two legs? How many legs do the animals have? There are answers. Some animals have no legs, like snails,and fish. Some mammals, like cats, dogs, tigers, bears and elepha...
Mammals:Mammals are a class of vertebrate organisms. They are warm blooded creatures and for the most part they give birth to live young which they nourish with milk.Answer and Explanation: Placental mammals have penile bones. The penile bones are used to maintain sufficient stiffness during ...
For example, we know a German shepherd is a dog, which is a mammal; all mammals are warm-blooded; therefore, a German shepherd should be warm-blooded. The main problem with symbolic AI is that humans still need to manually encode their knowledge of the world into the symbolic AI system,...
What mammals have opposable thumbs?Opposable Thumbs:If you look down at your hand, you would see an example of an opposable thumb. An opposable thumb is a thumb that is located opposite of the rest of the fingers. The thumb moves in opposition to the fingers or, in other words, the ...
All mammals have warm blood. They can warm up and cool down their bodies. A polar bear living in the snow has the same body temperature as a monkey in the rainforest. Mammals have fur or hair. Some fur or hair is short and some is long. Some fur or hair comes in cool patterns(图...
You may think it's difficult for them to sleep, but they have no such problems because giraffes don't often stop for a snooze(打盹). As they are so tall—males can grow up to 18 feet, giraffes actually have the shortest sleep requirement of all mammals(哺乳动物), with an average(平...
What do amphibians, reptiles, birds and mammals have in common? What do reptiles, amphibians and mammals have in common? What do fish, reptiles and amphibians have in common? What do amphibians and arthropods have in common? What do birds, reptiles, amphibians and fish have in common?
I assume we all believe that bats have experience. After all, they are mammals, and there is no more doubt that they have experience than that mice or pigeons or whales have experience. I have chosen bats instead of wasps or flounders because if one travels too far down the phylogenetic ...
FThe mystery of REM sleep is that even though it may not be essential, it is ubiquitous – at least in mammals and birds. But that doesn’t mean all mammals and birds dream (or if they do, they’re certainly not – talking about it). Some researchers think REM may have evolved for...