READ*,NX=1.0IF(N>=0)X=2*XIF(N>=5)X=2*X+1.0IF(N>15)X=3*X-1.0PRINT*,XEND如果从键盘输入15,则程序的运行结果是:()。
A.1.0
B.2.0
C.5.0
D.14.0
A.1.0
B.2.0
C.5.0
D.14.0
设X=lp,1≤p≤∞,{αn}为一纯量列使得当n→∞时,αn→0。求证:算子A:X→X
A(x)(n)=αnx(n),n≥1, x∈X
为紧算子。
Part C
Directions: Read the following text carefully and then translate the underlined segments into Chinese. (10 points)
Who would have thought that, globally, the IT industry produces about the same volume of greenhouse gases as the world's airlines do—roughly 2 percent of all C02 emissions?
Many everyday tasks take a surprising toll on the environment. A Google search can leak between 0. 2 and 7. 0 grams of C02, depending on how many attempts are needed to get the "right" answer. To deliver results to its users quickly, then, Google has to maintain vast data centres around the world, packed with powerful computers. While producing large quantities of C02, these computers emit a great deal of heat, so the centres need to be well air-conditioned, which uses even more energy.
However, Google and other big tech providers monitor their efficiency closely and make improvements. Monitoring is the first step on the road to reduction, but there is much more to be done, and not just by big companies.
A.mínxīng(明星)gēnzhèng(更正)
B.jīngyīng(金英)zhēngchéng(征程)
C.shénshèng(神圣)mìnglìng(命令)
D.rénmíng(人名)jīnyíng(经营)
根据方程式NX=(S-I)+(TA-G-TR),下列说法正确的是 ()
A.预算赤字的增加总是伴随着国内私人投资的减少
B.如果国民储蓄不足以为国内私人投资融资的话,贸易赤字将不得不增加
C.净出口的增加可以通过增加政府预算赤字来实现
D.只有当国内私人储蓄等于国内私人投资时,外部平衡才能实现