[单项选择]The impact (影响) of the frontier has been traditionally assumed by historians, who have studied its effects on mountain men and cowboys, political and social institutions. Yet the impact of the frontier on the most common dimension of life--upon the family--remains largely unexamined. Although family has been especially significant in the historical process, it is a relatively new area of historical research. In terms of westward migration, family played a special role. For a people who mistrusted the church as much as the state, family was the only institution that could be entrusted with the enterprise of settling the continent. A Christian family was enough of the church; a Christian family was sufficient expression of political and social order. In 1862, Congress provided for the distribution of lands to heads of households in a law, but that law merely recognized that settlement had been the business of families since the seventeenth century. Families took up the challenge
A. a knowledge of farming
B. diseases
C. road conditions
D. means of transportation

[单项选择]The impact (影响) of the frontier has been traditionally assumed by historians, who have studied its effects on mountain men and cowboys, political and social institutions. Yet the impact of the frontier on the most common dimension of life--upon the family--remains largely unexamined. Although family has been especially significant in the historical process, it is a relatively new area of historical research. In terms of westward migration, family played a special role. For a people who mistrusted the church as much as the state, family was the only institution that could be entrusted with the enterprise of settling the continent. A Christian family was enough of the church; a Christian family was sufficient expression of political and social order. In 1862, Congress provided for the distribution of lands to heads of households in a law, but that law merely recognized that settlement had been the business of families since the seventeenth century. Families took up the challenge
A. received little attention
B. was insignificant, if compared with the impact of the frontier on cowboys
C. was not so important as the church or the state
D. was overlooked completely

[简答题]The impact globalization has on local - national insurers is positive.

[填空题]How many years has she been married
She has been married （）.

[单项选择]Who has been there
A. The woman.
B. The man.
C. Neither.

[单项选择]A. He has been shopping around.
B. He has been looking for a job.
C. He has been dining in a restaurant.
D. He has been driving the cab.

[单项选择]A. It has been put off. B. It has been cancelled.
C. It will be held in a different place. D. It will be rescheduled to attract more participants.

[单项选择]As has always been the case when tragedy has struck our community, the people of our town feel the obligation, and rightly so, to ____ in support of the victim and his family.
A. entrench
B. rally
C. disseminate
D. apologize

[单项选择]Where has the woman been
A. To Colonado.
B. To Anzona.
C. To the Nile River.
D. To the Museum of Natural History.

[单项选择]Research into DNA has had a significant impact on medicine. Through recombinant DNA technology, scientists can modify microorganisms so that they become so-called factories that produce large quantities of medically useful drugs. This technology is used to produce insulin, which is a drug used by diabetics, and interferon, which is used by some cancer patients. Studies of human DNA are revealing genes that are associated with specific diseases, such as breast cancer. This information is helping physicians to diagnose various diseases, and it may lead to new treatments. For example, physicians are using a technology called chimeriplasty, which involves a synthetic molecule containing both DNA and RNA strands, in an effort to develop a treatment for a form of hemophilia.
Forensic science uses techniques developed in DNA research to identify individuals who have committed crimes. DNA from semen, skin, or blood taken from the crime scene can be compared with the DNA of a suspect, and
A. A．1～4______. DNA’s functionsB. DNA’s applicationsC. DNA’s researchD. DNA’s techniques