问题
选择题
下表表示人体细胞外液和细胞内液的物质组成和含量的测定数据，相关叙述不正确的是
A．④属于细胞内液，因为其含有较高的蛋白质、K+等
B．②属于血浆，③属于组织液，②的蛋白质含量减少将导致③增多
C．肝细胞中的CO2从产生场所扩散到②至少需要穿过6层磷脂分子层
D．③与④的成分存在差异的主要原因是细胞膜的选择透过性
答案
答案：C
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下表表示人体细胞外液和细胞内液的物质组成和含量的测定数据，相关叙述不正确的是
A．④属于细胞内液，因为其含有较高的蛋白质、K+等
B．②属于血浆，③属于组织液，②的蛋白质含量减少将导致③增多
C．肝细胞中的CO2从产生场所扩散到②至少需要穿过6层磷脂分子层
D．③与④的成分存在差异的主要原因是细胞膜的选择透过性
答案：C
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| Protecting (保护) wild animals is our duty. Because wild animals are important to us. They live with us on the earth together. If there are no animals on the earth, we will not live on, 1 . So we should take good care 2 them to help us live a healthy life. 3 some people still don't realize the 4 of protecting wild animals. They often kill wild animals for food or for money. Every day there are many wild animals being 5 . So lots of wild animals have died out (灭绝). We can't see them any more. Today the number of wild animals 6 becoming smaller and smaller. If we don't protect them, they will all die out. If this goes on, there will be no animals left on the earth. 7 , more and more people have begun to do many things to help protect wild animals. They ask people 8 killing wild animals. They get people to know that protecting wild animals is one of the most important things. Now many countries have made 9 laws (法律) to protect wild animals. Now that (既然) wild animals are so important to man, we should do our 10 to protect them and it means human beings can make friends with animals and get on well with them. | ||||
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