Special structures of the colon include

A、the magnitude of the electrical charge on each ion

B、the numer of atoms in ceramic

C、the relative sizes of the cations and anions

D、the weight of atoms in ceramic

Seventeenth-century houses in colonial North America were simple structures that were primarily functional, carrying over traditional designs that went back to the Middle Ages. During the first half of the eighteenth century, however, houses began to show a new elegance. As wealth increased, more and more colonists built fine houses.

Since architecture was not yet a specialized profession in the colonies, the design of buildings was left either to amateur designers or to carpenters who undertook to interpret architectural manuals imported from England. Inventories of colonial libraries show an astonishing number of these handbooks for builders, and the houses erected during the eighteenth century show their influence. Nevertheless, most domestic architecture of the first three-quarters of the eighteenth century displays a wide divergence of taste and freedom of application of the rules laid down in these books.

Increasing wealth and growing sophistication throughout the colonies resulted in houses of improved design, whether the material was wood, stone, or brick. New England still favored wood, though brick houses became common in Boston and other towns, where the danger of fire gave an impetus to the use of more durable material. A few houses in New England were built of stone, but only in Pennsylvania and adjacent areas was stone widely used in dwellings. An increased use of brick in houses and outbuildings is noticeable in Virginia and Maryland, but wood remained the most popular material even in houses built by wealthy landowners. In the Carolinas, even in closely packed Charleston, wooden houses were much more common than brick houses.

Eighteenth-century houses showed great interior improvements over their predecessors. Windows were made larger and shutters removed. Large, clear panes replaced the small leaded glass of the seventeenth century. Doorways were larger and more decorative. Fireplaces became decorative features of rooms. Walls were made of plaster or wood, sometimes elaborately paneled. White paint began to take the place of blues, yellows, greens, and lead colors, which had been popular for wails in the earlier years. After about 1730, advertisements for wallpaper styles in scenic patterns began to appear in colonial newspapers.

What does the passage mainly discuss?

A．A comparison of eighteenth-century houses and modern houses.

B．The improved design of eighteenth-century colonial houses.

C．The decorations used in eighteenth-century houses.

D．The role of carpenters in building eighteenth-century houses.

Seventeenth-century houses in colonial North America were simple structures that were primarily functional, carrying over traditional designs that went back to the Middle Ages. During the first half of the eighteenth century, however, houses began to show a new elegance. As wealth increased, more and more colonists built fine houses.

Since architecture was not yet a specialized profession in the colonies, the design of buildings was left either to amateur designers or to carpenters who undertook to interpret architectural manuals imported from England. Inventories of colonial libraries show an astonishing number of these handbooks for builders, and the houses erected during the eighteenth century show their influence. Nevertheless, most domestic architecture of the first three quarters of the eighteenth century displays a wide divergence of taste and freedom of application of the rules laid down in these books.

Increasing wealth and growing sophistication throughout the colonies resulted in houses of improved design, whether the material was wood, stone, or brick. New England still favored wood, though brick houses became common in Boston and other towns, where the danger of fire gave an impetus to the use of more durable material. A few houses in New England were built of stone, but only in Pennsylvania and adjacent areas was stone widely used in dwellings. An increased use of brick in houses and outbuildings is noticeable in Virginia and Maryland, but wood remained the most popular material even in houses built by wealthy landowners. In the Carolinas, even in closely packed Charleston, wooden houses were much more common than brick houses.

Eighteenth-century houses showed great interior improvements over their predecessors. Windows were made larger and shutters removed. Large, clear panes replaced the small leaded glass of the seventeenth century. Doorways were larger and more decorative. Fireplaces became decorative features of rooms. Walls were made of plaster or wood, sometimes elaborately paneled. White paint began to take the place of blues, yellows, greens, and lead colors, which had been popular for walls in the earlier years. After about 1730, advertisements for wallpaper styles in scenic patterns began to appear in colonial newspapers.

What does the passage mainly discuss?

A．A comparison of eighteenth-century houses and modern houses.

B．The improved design of eighteenth-century colonial houses.

C．The decorations used in eighteenth-century houses.

D．The role of carpenters in building eighteenth-century houses.

The ordinary family in colonial North America was primarily concerned with sheer physical survival and beyond that, is own economic prosperity. Thus, children were valued in terms of their productivity, and they assumed the role of producer quite early. Until they fulfilled this role, their position in the structure of the family was one of subordination and their psychological needs and capacities received little consideration. As the society became more complex, the status of children in the family and in the society became more important. In the complex, technological society that the United States has become, each member must fulfill a number of personal and occupational roles and be in constant contact with a great many other members. Consequently, viewing children as potentially acceptable and necessarily multifaceted members of society means that they are regarded more as people in their own right than as utilitarian organisms. This acceptance of children as equal participants in the contemporary family is reflected in the variety of statutes protecting the rights of children and in the social and public welfare programs devoted exclusively to their well-being. This new view of children and the increasing contact between the members of society has also resulted in a surge of interest in child-rearing techniques. People today spend a considerable portion of their time conferring on the proper way to bring up children. It is now possible to influence the details of the socialization of another person's child by spreading the gospel of current and fashionable theories and methods of child rearing. The socialization of the contemporary child in the United States is a two-way transaction between parent and child rather than a one-way, parent-to-child training program. As a consequence, socializing children and living with them over a long period time is for parents a mixture of pleasure, satisfaction, and problems.

Which of the following would be the best title for the passage?

A．The Place of Children in United States Society

B．The Children of Colonial North American

C．The Development of Cultural Values

D．The Child as a Utilitarian Organism

The ordinary family in colonial North America was primarily concerned with sheer (完全的, 纯粹的) physical survival and beyond that its own economic prosperity. Thus, children were valued in terms of their productivity, and they assumed the role of producer quite early. Until they fulfilled this role, their position in the structure of the family was one of subordination and their psychological needs and capacities received little consideration. As the society became more complex, the status of children in the family and in the society became more important. In the complex, technological society that the United States has become each member must fulfill a number of personal and occupational roles and be in constant contact with a great many other members. Consequently, viewing children as potentially acceptable and necessarily multifaceted (多方面的，多样化的) members of society means that they are regarded more as people in their own right than as utilitarian (功利主义的) organisms (社会成员). This acceptance of children as equal participants in the contemporary family is reflected in the variety of statutes protecting the rights of children and in the social and public welfare programs devoted exclusively to their well-being. This new view of children and the increasing contact between the members of society has also resulted in a surge (浪潮，波涛) of interest in child-rearing techniques. People today spend a considerable portion of their time conferring on the proper way to bring up children. It is now possible to influence the details of the socialization of another persons child by spreading the gospel (经典，福音) of current and fashionable theories and methods of child rearing. The socialization of the contemporary child in the United States is a two-way transaction between parent and child rather than a one-way, parent-to-child training program. As a consequence, socializing children and living with them over a long period of time is for parents a mixture of pleasure, satisfaction, and problems.

Which of the following would be the best title for the passage?

A．The Place of Children in United States Society.

B．The Children of Colonial North America.

C．The Development of Cultural Values.

D．The Child as a Utilitarian Organism.

A、left-right

B、top-bottom

C、enclosure

D、semi-enclosure

A、a lipid bilayer

B、dynamic motion of both membrane lipids and proteins

C、proteins that may rest on the surface, or penetrate the membrane

D、all of the above

Examine the structures of the EMPLOYEES and TAX tables.EMPLOYEESEMPLOYEE_ID NUMBER NOT NULL, PrimaryKeyEMP_NAME VARCHAR2 (30)JOB_ID VARCHAR2 (20)SALARY NUMBERReferencesMGR_ID NUMBEREMPLOYEE_IDcolumnDEPARTMENT_ID NUMBER Foreign key toDEPARTMENT _IDcolumn of theDEPARTMENT tableTAXMIN_SALARY NUMBERMAX_SALARY NUMBERTAX_PERCENT NUMBERPercentage tax for givensalary rangeYou need to find the percentage tax applicable for each employee. Which SQL statement would you use?（）

A. SELECT employee_id, salary, tax_percent FROM employees e, tax t WHERE e.salary BETWEEN t.min _ salary AND t.max_salary

B. SELECT employee_id, salary, tax_percent FROM employees e, tax t WHERE e.salary > t.min_salary, tax_percent

C. SELECT employee_id, salary, tax_percent FROM employees e, tax t WHERE MIN(e.salary) = t.min_salary AND MAX(e.salary) = t.max_salary

D. You cannot find the information because there is no common column between the two tables.