引起该疾病的主要病因是A.吸烟B.食物嵌塞C.不良的修复体D.软垢与牙

Leonard Bloomfield, a linguist in America, is regarded as the father of American______.

A．structuralism

B．naturalism

C．functionalism

D．audiolingualism

Leonard Bloomfield, a linguist in America, is regarded as the father of American______.

A. structuralism

B. naturalism

C. functionalism

D. audiolingualism

According to Sandra Davis, recession of the early 1990s is regarded to have

A．affected the whole society in their life style.

B．caused some changes in family structures.

C．encouraged more lawyers to consider divorce cases.

D．resulted from the divorce trends.

When was Hamburger really regarded as typical of America？

A．In the Middle Ages.

B．In the 19th century.

C．In the 18th century.

D．In 1904.

______ were regarded as the people who first used umbrellas.

A．Romans

B．Greeks

C．Chinese

D．Europeans

______, a linguist in America, is regarded as the father of American structuralism.

A．Franz Boas

B．Edward Sapir

C．Leonard Bloomfield

D．Hell Dymes

______is unquestioningly regarded as America's greatest playwright.

A．R.B.Sheridan

B．Eugene O’Neill

C．T. S. Eliot

D．Ezra Pound

A.be regarded as a vessel not under command

B.be regarded as a vessel underway

C.be regarded as a vessel

D.be regarded as a sailing vessel

______, a linguist in America, is regarded as the father of American structuralism.

A．Franz Boas

B．Edward Sapir

C．Leonard Bloomfield

D．Hell Dymes