[单项选择]

Human language is a living thing. Each language has its own biological system, which makes it different from all other languages. This system must constantly adjust to a new environment and new situations to survive and flourish (兴盛).
When we think of human language this way, it is an easy step to see the words of a language as being like the ceils of a living organism (机物)-they are constantly forming and dying and splitting into parts as time changes and the language adapts.
There are several specific processes by which new words are formed. Some words come into the language which sound like what they refer to. Words like buzz (嗡嗡) and ding-dong are good examples of this process.
Still another way in which new words are formed is to use the name of a person or a place closely associated with that word’s meaning. The words sandwich and hamburger are examples of this word-formation process. The Earl ( 伯爵 ) of Sandwich was so fond of gambling at cards
A. the biological system of a living organism
B. the inventors of sandwich and hamburger
C. the development of human ceils
D. the changes of a language

[单项选择]

Human language is a living thing. Each language has its own biological system, which makes it different from all other languages. This system must constantly adjust to a new environment and new situations to survive and flourish (兴盛).
When we think of human language this way, it is an easy step to see the words of a language as being like the ceils of a living organism (机物)-they are constantly forming and dying and splitting into parts as time changes and the language adapts.
There are several specific processes by which new words are formed. Some words come into the language which sound like what they refer to. Words like buzz (嗡嗡) and ding-dong are good examples of this process.
Still another way in which new words are formed is to use the name of a person or a place closely associated with that word’s meaning. The words sandwich and hamburger are examples of this word-formation process. The Earl ( 伯爵 ) of Sandwich was so fond of gambling at cards
A. it is similar to the biological system of a living organism
B. it actually has many living cells that split and form constantly
C. it must adjust to new environments to survive
D. its old words die out while new words are constantly added

[单项选择]Language belongs to each member of the society, to the cleaner_________to the professor.
A. as far as
B. the same as
C. as much as
D. as long as

[填空题]person living near to each other

[单项选择] Defective Genes and Human Health Each of us carries about half a dozen defective(有缺点的) genes. We remain blissfully(快乐地) unaware of this fact unless we, or one of our close relatives, are amongst the many millions who suffer from a genetic disease. About one in ten people has, or will develop at some later stage, an inherited(遗传的)genetic disorder, and approximately 2,800 specific conditions are known to be caused by defects (mutations) in just one of the patient’’s genes. Some single gene disorders are quite common-—cystic(胞状的) fibrosis (纤维化) is found in one out of every 2,500 babies born in the Western World—and in total, diseases that can be traced to single gene defects account for about 5% of all admissions to children’’s hospitals. Most of us do not suffer any harmful effects from our defective genes because we carry two copies of nearly all genes, one derived from our mother and the other from our father. The only exceptions to this rule are the g
A. About 10% people have developed an inherited genetic disorder.
B. Diseases of genetic origin account for about 5% of all admissions to hospitals.
C. All the defective genes produce bad effects.
D. Hemophilia is a kind of the X chromosome-linked genetic disease.