1[单选题] 4只16Ω的电阻并联后等效电阻为 A.64Ω B.16Ω C.4Ω D.8Ω - 查题网

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河南成教 / 电气安全

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1[单选题]
4只16Ω的电阻并联后等效电阻为

A.64Ω

B.16Ω

C.4Ω

D.8Ω

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电气安全

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2[简答题] How America Lives (1) Americans still follow many of the old ways. In a time of rapid changes it is essential that we remember how much of the old we cling to. Young people still get married. Of course, many do get divorced, but they remarry at astonishing rates. They have children, but fewer than before. They belong to churches, even though they attend somewhat less frequently, and they want their children to have religious instruction. They are willing to pay taxes for education, and they generously support institutions like hospitals, museums and libraries. In fact, when you compare the America of today with that of 1950, the similarities are far greater than the differences. (2) Americans seem to be growing conservative. The 1980 election, especially for the Senate and House of Representatives, signaled a decided turn to the right insofar as political and social attitudes were concerned. It is as if our country spent the 1960s and 1970s jealously breaking out of old restraints and now wishes to put the brakes on. We should expect to see a reaffirmation of traditional family values, sharp restraints on pornography, a return to religion and a rejection of certain kinds of social legislation. (3) Patterns of courtship and marriage have changed radically. Where sex was concerned, I was raised in an atmosphere of suspicion, repression and Puritanism, and although husky young kids can survive almost anything, many in my generation suffered grievously. Without reservation, I applaud the freer patterns of today, although I believe that it’s been difficult for some families to handle the changes. (4) American women are changing the rules. Thirty years ago I could not have imagined a group of women employees suing a major corporation for millions of dollars of salary which, they alleged, had been denied them because they had been discriminated against. 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