问题 填空题

分析下表的资料后,请回答下列问题。

(1)我国哪一类生物在世界上占有的百分比最高? ____________。

(2)试计算我国上述的几类生物类群总数占世界的平均百分比:_______________。 

(3)在上表所列的生物类群中,请你写出四种我国珍稀动植物的名称:_____________。 

(4)下表中的资料说明了“生物多样性”内涵中的___________的多样性。

(5)你认为保护生物多样性最有效的措施是_______________。

答案

(1)裸子植物    

(2)15.71% (保留两位小数)    

(3)金丝猴      扬子鳄      白鳍豚      朱鹮      银杉      珙桐  (写出其中四种即可)    

(4)生物种类    

(5)建立自然保护区

单项选择题 A1/A2型题
单项选择题 案例分析题

From childhood to old age, we all use language as a means of broadening our knowledge of ourselves and the world about us. When humans first 1 , they were like newborn children, unable to use this 2 tool. Yet once language developed, the possibilities for human kind’s future 3 and cultural growth increased.

Many linguists believe that evolution is 4 for our ability to produce and use language. They 5 that our highly evolved brain provides us 6 an innate language ability not found in lower 7 . Proponents of this innateness theory say that our 8 for language is inborn, but that language itself develops gradually, 9 a function of the growth of the brain during childhood. Therefore there are critical 10 times for language development.

Current 11 of innateness theory are mixed, however, evidence supporting the existence of some innate abilities is undeniable. 12 , more and more schools are discovering that foreign languages are best taught in 13 grades. Young children often can learn several languages by being 14 to them, while adults have a much harder time learning another language once the 15 of their first language have become firmly fixed.

16 some aspects of language are undeniably innate, language does not develop automatically in a vacuum. Children who have been 17 from other human beings do not possess language. This demonstrates that 18 with other human beings is necessary for proper language development. Some linguists believe that this is even more basic to human language 19 than any innate capacities. These theorists view language as imitative, learned behavior. 20 , children learn language from their parents by imitating them. Parents gradually shape their child's language skills by positively reinforcing precise imitations and negatively reinforcing imprecise ones.

请在18处填上正确答案()

A.exposition

B.comparison

C.contrast

D.interaction