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解答 答案:D.根据真正主语how many animal species are in the danger of dying out可见空白处应为形式主语,纵观选项,唯有it可担当形式主语,故选D.注意区分主语从句B选项what…is 从句,就对了. 点评 本题考查it 形式主语,结合语义的基础上便能选出正确答案,同时要注意与主语从句不要混淆.练习...
题目 A new rule has been passed that will protect more than 50 of the world's shark species,many of which are endangered.The rule was signed by the Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES),which manages how people deal in...
today there are many endangered species in the world. it’s time to do something for the animals which are almost etinct. what we should do? first, finding what the source of the situation is. people have destroyed the environment. people have hunted for meat. actually, wild animals are ...
1. What could help conservation of the oceans? 1.什么可以帮助保护海洋? 2. Can we stop ourselves from aging? 2.我们可以阻止自己衰老吗? 3. Why can only some cells become other cells? 3.为什么只有一些细胞会变成其他细胞? 4. Why are some genomes so big and others very small?
How are whale sharks endangered?Whale Sharks:The largest shark, fish, and nonmammalian animal in the world is the whale shark (Rhincodon typus). It belongs to a group of sharks called carpet sharks, which make up the order Orectolobiformes. Like many other carpet sharks, they have an ...
How many teeth do Homo sapiens have? How wide can a whale shark open its mouth? How many teeth do orangutans have? How many sharks are on the endangered species list? How many teeth does a baboon have? How many teeth does a fox have?
患者，女，30岁。发热原因待查。查体：体温39℃，早晚高低不一，日差约2℃，持续5天不退；脉搏96次/min，呼吸23次/min；口腔黏膜干燥，左颊黏膜有一0.2cm×0.2cm溃疡面，基底潮红。根据体温曲线，该患者发热的热型是（）
The team looked at the retinal cells of 17 species of sharks caught off Queensland and Western Australia and found out that the cells are responsible for sharks' color blindness.(西澳大利亚大学的一个研究小组研究了许多不同种类鲨鱼的视觉系统,他们发现眼睛设计的多样性反映了鲨鱼物...
Cryptic genetic divergence in a threatened marine fish and the resurrection of a geopolitical species. Endangered Species Res. 7, 167-174 http://dx.doi.org/10.3354/esr00117.Craig, M. T., Graham, R. T., Torres, R. A., Hyde, J. R., 2009. How many species of goliath grouper are ...