如图所示,理想变压器原、副线圈的匝数之比是10:1,原线圈输入交变电压u=141

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问题:

如图所示,理想变压器原、副线圈的匝数之比是10:1,原线圈输入交变电压u=141.4sin50πt(V),O是副线圈中心抽出的线头,R1=5Ω,R2=15Ω,则(  )

A.开关S断开时,电流表的示数为0.05A

B.开关S闭合时,电流表的示数为0.05A

C.开关S闭合时,两电阻总的电功率为

20
3
W

D.开关S断开时,两电阻总的电功率为

20
3W

考点:变压器的结构和原理
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储蓄医疗保险的典型国家是()。
商业医疗保险的典型国家是()。
国家医疗保险的典型国家是()。

A.美国

B.德国

C.英国

D.新加坡

E.马来西亚

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为了使计时器控件Timer1每隔0.5秒触发一次Timer事件,应将Timer1控件的【 】属性设置为【 】。

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在FrontPage Express 中,设置网页背景颜色的时候用菜单中的( )一项。

A.查看

B.格式

C.编辑

D.工具

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液压传动中常用的粘度有()

A.动力粘度

B.运动粘度

C.相对粘度

D.绝对粘度

E.一般粘度

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The most thoroughly studied intellectuals in the history of the New World are the ministers and political leaders of seventeenth-century New England. According to the standard history of American philosophy, nowhere else in colonial America was “so much importance attached to intellectual pursuits.” According to many books and articles, New England’s leaders established the basic themes and preoccupations of an unfolding, dominant Puritan tradition in American intellectual life.

To take this approach to the New Englanders normally means to start with the Puritans’ theological innovations and their distinctive ideas about the church—important subjects that we may not neglect. But in keeping with our examination of southern intellectual life, we may consider the original Puritans as carriers of European culture, adjusting to New World circumstances. The New England colonies were the scenes of important episodes in the pursuit of widely understood ideals of civility and virtuosity.

The early settlers of Massachusetts Bay included men of impressive education and influence in England. Besides the ninety or so learned ministers who came to Massachusetts churches in the decade after 1629, there were political leaders like John Winthrop, an educated gentleman, lawyer, and official of the Crown before he journeyed to Boston. These men wrote and published extensively, reaching both New World and Old World audiences, and giving New England an atmosphere of intellectual earnestness.

We should not forget, however, that most New Englanders were less well educated. While few crafts men or farmers, let alone dependents and servants, left literary compositions to be analyzed, it is obvious that their views were less fully intellectualized. Their thinking often had a traditional superstitious quality. A tailor named John Dane, who emigrated in the late 1630s, left an account of his reasons for leaving England that is filled with signs. Sexual confusion, economic frustrations, and religious hope—all came together in a decisive moment when he opened the Bible, told bas father that the first line he saw would settle his fate, and read the magical words: "Come out from among them, touch no unclean thing, and I will be your God and you shall be my people." One wonders what Dane thought of the careful sermons explaining the Bible that he heard in Puritan churches.

Meanwhile, many settlers had slighter religious commitments than Dane’s, as one clergyman learned in confronting folk along the coast who mocked that they had not come to the New World fur religion. "Our main end was to catch fish.

The author holds that in the seventeenth-century New England ()

A. Puritan tradition dominated political life

B. intellectual interests were encouraged

C. politics benefited much from intellectual endeavors

D. intellectual pursuits enjoyed a liberal environment

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