They had no enemies until fish began to grow large teeth. Then fish began eating them. Finally, huge sea scorpions died out. Fortunately, at least one sea scorpion left a claw behind but it became as hard as stone. Then one day it was discovered, and this is the claw that the ...
( )3. ___ sharp teeth you have! A. What B. How C. Which 相关知识点: 试题来源: 解析 3.A 结果一 题目 ( A )3.___ sharp teeth you have! A. What B. How C. Which 答案 答案见上相关推荐 1( A )3.___ sharp teeth you have! A. What B. How C. Which ...
where the shark mistakes a swimmer for fish. 它把游泳者当成鱼了。 In recent years the average annual number of worldwide deaths from shark bites was as low as four. 近年来,全球平均每年死于鲨鱼咬伤的人数低至4人。 Today sharks should be the apex predators of the ocean - 如今,鲨鱼应该是海...
teeth every day.2.That's__(a) orange sweater.It's__(Paul) sweater.3.Can your brother__(draw)?Yes.He likes__(draw) very much.4.I don't like these yellow__(dress).I like that pink__(one)5.The souse__(have) small teeth.Its teeth__(be) sharp).6.Do you like__(play) ...
Which teeth do you use to crack a walnut? africanus's premolars– teeth just behind the sharper canines – were strong enough to crush the shells of nuts that would have been too large to fit between the even more powerful molars further back in the mouth. “Try sticking a walnut in yo...
They had no enemies until fish began to grow large teeth.Then fish began cating them. Finally, huge se a scorpions died out. Fortunately, at least one se a scorpion left a claw behind but it became as hard as stone. Then one day it was discovered, and this is the claw that the ...
1. How many months have 28 days?2. Which horses have six legs?3. What has teeth but can't eat? 相关知识点: 试题来源: 解析 1. All of them. Each month has its 28th day. 2. All horses have forelegs (,four legs) in front and two in back, so they all have six legs. 3. A...
The shark's body is streamlined (流线型的) to allow these effective hunters to slide through the water smoothly.Sharks that swim around on the ocean floor usually have flat bodies,allowing them to slide across the sand unnoticed.Unlike other fish,which have both bones and car...
Based on the evidence-based assessment of existing randomized clinical trials performed for this chapter, pit and fissure sealants can be effectively applied on any deciduous or permanent posterior teeth without adverse effects on their clinical performance. However, caries susceptibility varies among ...
题目Sharks are the world's most frightening and impressive fish. They are distributed all over the world and are believed to have been in existence before the dinosaurs. In fact, scientists guess that the earliest shark species were swimming in the earth's waters some 420 m...