题目内容
（请给出正确答案）
The most important factor that causes the wear of the engine parts is _____.
A.excessive heat
B.friction
C.oxidation
D.high pressure
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A、Great Hall of the People
B、The Monument to the People’s Heroes
C、National Museum of China
D、Chairman Mao Zedong Memorial Hall
Many linguists believe that evolution is【C4】______for our ability to produce and use language. They【C5】______that our highly evolved brain provides us【C6】______an innate language ability not found in lower【C7】______. Proponents of this innateness theory say that our【C8】______for language is inborn, but that language itself develops gradually,【C9】______a function of the growth of the brain during childhood. Therefore there are critical【C10】______times for language development.
Current【C11】______of innateness theory are mixed; however, evidence supporting the existence of some innate abilities is undeniable.【C12】______, more and more schools are discovering that foreign languages are best taught in【C13】______grades. Young children often can learn several languages by being【C14】______to them, while adults have a much harder time learning another language once the【C15】______of their first language have become firmly fixed.
【C16】______some aspects of language are undeniably innate, language does not develop automatically in a vacuum. Children who have been【C17】______from other human beings do not possess language. This demonstrates that【C18】______with other human beings is necessary for proper language development. Some linguists believe that this is even more basic to human language【C19】______than any innate capacities. These theorists view language as imitative, learned behavior.【C20】______, 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.
【C1】
A．generated
B．evolved
C．born
D．originated
There was a "mistake" in each of the following sentences. Can you identify and revise them? 1) A rent charge is the right to receive an annual sum out of the income of land every year. 2) All of the solutions considered so far have only involved Legendre functions of even order. 3) Before spelling out exactly what this means, it is worth first asking whether translating machinery is necessarily irreversible. 4) Being in charge, the accusation was particularly annoying to me. 5) However, there were other patients whose lives had ended by suicide.
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