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[单选题]
关于下列for t in range（1, 11): x = int（input（）) if x>=0: print（x)循环，叙述正确的是（）。
A.当x小于0时整个循环结束
B.x大于等于0时什么也不输出
C.程序最多能输出11个数
D.程序可能什么都不会输出
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题目内容
（请给出正确答案）
如果结果不匹配，请 联系老师 获取答案
题目内容
（请给出正确答案）
A.当x小于0时整个循环结束
B.x大于等于0时什么也不输出
C.程序最多能输出11个数
D.程序可能什么都不会输出
如果结果不匹配，请 联系老师 获取答案
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A.list(range(1,7,2))
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B．That range of growth rate may be insufficient to maintain the stability of the national economy.
C．Too fast an economic growth rate will probably cause turbulence as many industries in China may not have that capacity.
D．Other countries have only 1% or 2% economic growth rate while only China has a 5% above growth rate.
Even before Alan Greenspan's admission that America's red-hot economy is cooling, lots of working folks had already seen signs of the slowdown themselves. From car dealerships to Gap outlets, sales have been lagging for months as shoppers temper their spending. For retailers, who last year took in 24 percent of their revenue between Thanksgiving and Christmas, the cautious approach is coming at a crucial time. Already, experts say, holiday sales are off 7 percent from last year's pace. But don't sound any alarms just yet. Consumers seem only mildly concerned, not panicked, and many say they remain optimistic about the economy's long-term prospects, even as they do some modest belt-tightening.
Consumers say they're not in despair because, despite the dreadful headlines, their own fortunes still feel pretty good. Home prices are holding steady in most regions. In Manhattan, "there's a new gold rush happening in the $4 million to $10 million range, predominantly fed by Wall Street bonuses," says broker Barbara Corcoran. In San Francisco, prices are still rising even as frenzied overbidding quiets. "Instead of 20 to 30 offers, now maybe you only get two or three," says John Tealdi, a Bay Area real-estate broker. And most folks still feel pretty comfortable about their ability to find and keep a job.
Many folks see silver linings to this slowdown. Potential home buyers would cheer for lower interest rates. Employers wouldn't mind a little fewer bubbles in the job market. Many consumers seem to have been influenced by stock-market swings, which investors now view as a necessary ingredient to a sustained boom. Diners might see an upside, too. Getting a table at Manhattan's hot new Alain Ducasse restaurant used to be impossible. Not anymore. For that, Greenspan ＆ Co. may still be worth toasting.
By "Ellen Spero isn't biting her nails just yet" (Line 1, Paragraph 1), the author means______.
A．Spero can hardly maintain her business
B．Spero is too much engaged in her work
C．Spero has grown out of her bad habit
D．Spero is not in a desperate situation
Even before Alan Greenspan’s admission that America’s red-hot economy is cooling, lots of working folks had already seen signs of the slowdown themselves. From car dealerships to Gap outlets, sales have been lagging for months as shoppers temper their spending. For retailers, who last year took in 24 percent of their revenue between Thanksgiving and Christmas, the cautious approach is coming at a crucial time. Already, experts say, holiday sales are off 7 percent from last year’s pace. But don’t sound any alarms just yet. Consumers seem only concerned, not panicked, and many say they remain optimistic about the economy’s long-term prospects, even as they do some modest belt-tightening.
Consumers say they’re not in despair because, despite the dreadful headlines, their own fortunes still feel pretty good. Home prices are holding steady in most regions. In Manhattan, “there’s a new gold rush happening in the $4 million to $10 million range, predominantly fed by Wall Street bonuses,” says broker Barbara Corcoran. In San Francisco, prices are still rising even as frenzied overbidding quiets. “Instead of 20 to 30 offers, now maybe you only get two or three,” says john Deadly, a Bay Area real-estate broker. And most folks still feel pretty comfortable about their ability to find and keep a job.
Many folks see silver linings to this slowdown. Potential home buyers would cheer for lower interest rates. Employers wouldn’t mind a little fewer bubbles in the job market. Many consumers seem to have been influenced by stock-market swings, which investors now view as a necessary ingredient to a sustained boom. Diners might see an upside, too. Getting a table at Manhattan’s hot new Alain Ducasse restaurant need to be impossible. Not anymore. For that, Greenspan & Co. may still be worth toasting.
第51题：By “Ellen Spero isn’t biting her nails just yet”(Line 1, Paragraph 1), the author means
A Spero can hardly maintain her business.
B Spero is too much engaged in her work.
C Spero has grown out of her bad habit.
D Spero is not in a desperate situation.
图所示电路原无初始储能，试求在下列情况下t＞0时的iL(t)：
(1)
(2)L=2H。
设A为n阶可逆矩阵，则下列结论正确的是()．
A．(2A)-1=2A-1
B．(2A)T=2AT
C．[(A-1)-1]T=[(AT)T]-1
D． [(AT)-1]T=[(A-1)T]-1
已知
[f(t)-]=F(s)，m≥n，a＞0，b≥0，试求下列函数的Laplace变换．
(1)tmf(n)(t)；
(3)f(at—b)u(at—b)．
A.打印1到100之间能被7整除且不能被5整除的数
B.打印1到100之间能被7整除或不能被5整除的数
C.打印1到101之间能被7整除且不能被5整除的数
D.打印1到101之间能被7整除或不能被5整除的数
