用ls–al命令列出文件列表,其中lrwxr--r--1helusers2024Sep1208:12cheng这个文件是符号连接文件（）

● 在Linux系统中可用ls -al命令列出文件列表， （31） 列出的是一个符号连接文件。

（31）

A. drwxr-xr-x 2 root root 220 2009-04-14 17:30 doc

B. –rw-r--r-- 1 root root 1050 2009-04-14 17:30 doc1

C. lrwxrwxrwx 1 root root 4096 2009-04-14 17:30 profile

D. drwxrwxrwx 4 root root 4096 2009-04-14 17:30 protocols

在Linux系统中可用ls -al命令列出文件列表，______列出的是一个符号连接文件。

A．Drwxr-xr-x 2 root root 220 2009-04-14 17:30Doe

B．-rw-r--r-- 1 root root 1050 2009-04-14 17:30DoC1

C．lrwxrwxrwx 1 root root 4096 2009-04-14 17:30 profile

D．Drwxrwxrwx 4 root root 4096 2009-04-14 17:30 protoCols

在Linux系统中可用ls -al命令列出文件列表，______列出的是一个符号连接文件。

A．Drwxr-xr-x 2 root root 220 2009-04-14 17:30Doe

B．-rw-r--r-- 1 root root 1050 2009-04-14 17:30DoC1

C．lrwxrwxrwx 1 root root 4096 2009-04-14 17:30 profile

D．Drwxrwxrwx 4 root root 4096 2009-04-14 17:30 protoCols

当执行下列指令后，(AL)=【 】，(DX)=3412H。

STR1 LABEL WORD

STR2 DB 12H

DB 34H

MOV AL，STR2

MOV DX，STR1

【R1】

A. IT LOOKS LIKE THIS DOWNTURN IS IN FOR THE LONG HAUL.

B. SKILLED WORKERS MIGHT NOT BE SPARE

D.

C. IT HAS ALREADY HURT JOB GROWT

H.

D. IF YOU WERE GOING TO RETIRE SOON, IT WILL BE A LOT HARDER TO.

E. THE DAMAGE IS LIKELY TO SPREAD TO OTHER SECTORS. BY NOW, YOU"RE PROBABLY UP TO YOUR EYEBALLS IN UNSETTLING ECONOMIC CRISIS NEWS. THE STOCK MARKETS, TANKE

D. REAL ESTATE VALUE, SUN

K. BUT MUCH LESS HAS BEEN SAID ABOUT PROBABLY A MORE PRESSING CONCERN TO MOST WORKERS —YOUR JO

B. IS IT SAFE? HOW LONG WILL IT BE BEFORE YOU CAN EXPECT TO SEE A RAISE OR BONUS AGAIN? 【R1】______ UNFORTUNATELY, THE CREDIT CRISIS HAS ALREADY BEGUN AFFECTING JOB GROWT

H. THE UNEMPLOYMENT RATE HAS GROWN AN ENTIRE PERCENTAGE POINT—FROM 5. LTO 6. 1—BETWEEN MARCH AND AUGUST. FURTHERMORE, IT IS LIKELY TO GET WORSE BEFORE IT GETS BETTER. GOLDMAN SACHS GROUP ECONOMISTS WROTE IN A REPORT TO CLIENTS YESTERDAY THAT THEY EXPECTED UNEMPLOYMENT TO RISE TO SEVEN PERCENT IN LATE 2009. 【R2】______ AT THE OUTSET OF HOUSING MARKET"S TURMOIL, MOST EXPECTED JOBS IN THE BANKING, FINANCE, CONSTRUCTION AND REAL ESTATE SECTORS TO TAKE A DIRECT HIT, AS THE PROBLEMS STARTED IN THOSE AREAS. HOWEVER, NOW IT IS CLEAR THAT THE DAMAGE IS LIKELY TO SPREAD TO OTHER INDUSTRIES, INCLUDING ONES THAT WHO USE CREDIT TO BUY THEIR GOODS OR RELY ON NEW INVESTMENTS TO MOVE FORWAR

D. IN SHORT, MOST OF THE

M. AS FOR THE IT DEPARTMENT, DAVID FOOTE, CEO AT THE IT WORKFORCE RESEARCH CONSULTANCY, TOLD COMPUTERWORLD THIS WEEK THAT HE THINKS MORE COMPANIES WILL BE LOOKING MORE CLOSELY AT THAT PARTS OF IT SPENDING ARE CRITICAL, AND SOME IT WORKERS MAY BE SAFER THAN OTHERS. BUT, OVERALL, HE FINDS LITTLE REASON FOR TECHIES TO WORRY. 【R3】______ HISTORICALLY, MOST DOWNTURNS HAVE SPARED WHITE COLLAR AND HIGHLY-SKILLED WORKERS WHILE HITTING THE LEAST SKILLED THE HARDEST. YET OBSERVERS BELIEVE THAT THIS DOWNTURN IS LIKELY TO BE MORE DEMOCRATIC THAN ONES PREVIOUSLY, BECAUSE OF THE SEVERITY OF THE CREDIT CRUNC

H. "RESEARCH INDICATES THAT EMPLOYERS HIRE RELATIVELY MORE SKILLED WORKERS WHEN THEY INVEST IN NEW PLANT AND EQUIPMENT," ALAN

B. KRUEGER, AN ECONOMIST AT PRINCETON, TOLD THE NEW YORK TIMES THIS WEE

K. "IF FUNDS FOR INVESTMENT ARE NOT AVAILABLE BECAUSE OF THE FINANCIAL CRISIS, HOWEVER, COMPANIES WILL HIRE FEWER SKILLED WORKERS. " 【R4】______ IF YOU"VE JUST RETIRED OR WERE ABOUT TO, SADLY, YOUR TIMING COULD NOT BE WORSE AS BY BEGINNING TO WITHDRAW FROM YOU NEST EGG JUST AS THE MARKETS TUMBLE, YOU ARE ESSENTIALLY LOCKING IN YOUR LOSSES. BUT WHAT IF THE WHEELS OF YOUR RETIREMENT WERE ALREADY IN MOTION? EXPERTS SAY, AS DEPRESSING AS IT SOUNDS, WORKING JUST A FEW YEARS LONGER CAN MAKE A BIG DIFFERENC

E. "IT DOES NOT HAVE TO BE ENTIRELY UNPLEASANT," WRITES NEW YORK TIMES COLUMNIST TARA SIEGEL BENARD, "MAYBE YOU COULD WORK PART TIME AND EARN ENOUGH TO COVER THE AMOUNT YOU WOULD HAVE DRAWN FROM YOUR RETIREMENT PORTFOLIO. AT LEAST YOU ARE NOT DIPPING INTO YOUR SAVINGS WHILE THEY ARE DOW

N. " 【R5】______ THE NEXT LOGICAL QUESTION IS, "WELL, HOW LONG WILL THIS LAST?" AND WHILE NOBODY AGREES ON AN EXACT DATE, FEW HAVE ANY CONFIDENCE THAT IT WILL BE OVER BY THE HOLIDAYS. MANY ARGUE THAT IT WILL BE AT LEAST 30 MONTHS LON

G. IT"S NOT JUST ECONOMISTS AND PUNDITS. ONE READER POLL IN A BUSINESS NEWSPAPER FOUND THE 54 PERCENT OF RESPONDENTS BELIEVED THAT THE RECESSION WOULD LAST THROUGH THE SECOND HALF OF 2009 AND POSSIBLY AS LONG AS 2011.

Fishermen on the high seas have plenty of worries, not the least of which are boat tossing storms, territorial squabbles and even pirates. Now Boris Worm, a marine biologist at Dalhousie University in Halifax, Canada, has added another. After studying, among other things, global catch data over more than 50 years, he and a team of 13 researchers in four countries have come to a stunning conclusion. By the middle of this century, fishermen will have almost nothing left to catch. "None of us regular working folk are going to be able to afford seafood," says Stephen Palumbi, a Stanford University marine biologist and co-author of the study published in Science. "It's going to be too rare and too expensive."

Don't tell that to your local sushi chef. Over the past three decades, the fish export trade has grown fourfold, to 30 million tons, and its value has increased ninefold, to $ 71 Billion. The dietary attractiveness of seafood has stoked demand. About 90% of the ocean's big predators like cod and tuna--have been fished out of existence. Increasingly, fish and shrimp farms are filling the shortfall. Though touted as a solution to overfishing, many of them have--along with rampant coastal development, climate change and pollution devastated the reefs, mangroves and seagrass beds where many commercially valuable fish hatch.

Steven Murawski, chief scientist at the U. S. National Marine Fisheries Service, finds Worm's headlining prediction far too pessimistic, Industry experts are even more skeptical "There's now a global effort to reduce or eliminate fishing practices that aren't sustainable," says industry analyst Howard Johnson. "With that increased awareness, these projections just aren't realistic."

Perhaps. Still, the destructive fishing practices that have decimated tuna and cod have not declined worldwide, as Johnson suggests. Up to half the marine life caught by fishers is discarded, often dead, as bycatch, and vibrant coral forests are still being stripped bare by dragnets. Worm argues that fisheries based on ecosystems stripped of their biological diversity are especially prone to collapse. At least 29% of fished species have already collapsed, according to the study, and the trend is accelerating.

what's a fish eater to do? "Vote with your wallet," says Michael Sutton, who runs the Monterey Bay Aquarium's Seafood Watch program in California. Since 1999, the aquarium has handed out pocket guides listing sustainably harvested seafood. The Marine Stewardship Council has partnered with corporations to similarly certify wild and farm-raised seafood. Some 370 products in more than two dozen countries bear the British group's "Fish Forever" label of approval. Wal-Mart and Red Lobster, among others, have made commitments to sell sustainably harvested seafood.

But that's just a spit in the ocean unless consumers in Japan, India, China and Europe join the chorus for change. "If everyone in the U. S. started eating sustainable seafood," says Worldwatch Institute senior researcher Brian Halweil, "it would be wonderful, but it wouldn't address the global issues. We're at the very beginning of this."

It can be inferred from the first paragraph that ______.

A．fishermen are afraid of pirates and storms most.

B．people should take measures to secure fish supply.

C．about 50 years later, we won't be able to eat fish.

D．Worm expects global catch data to continue surging.

______ how to deal with the trouble of the computer, Martin had to ask his brother for help.

A．Not know

B．Not known

C．Not to know

D．Not knowing

【R2】

A. IT LOOKS LIKE THIS DOWNTURN IS IN FOR THE LONG HAUL.

B. SKILLED WORKERS MIGHT NOT BE SPARE

D.

C. IT HAS ALREADY HURT JOB GROWT

H.

D. IF YOU WERE GOING TO RETIRE SOON, IT WILL BE A LOT HARDER TO.

E. THE DAMAGE IS LIKELY TO SPREAD TO OTHER SECTORS. BY NOW, YOU"RE PROBABLY UP TO YOUR EYEBALLS IN UNSETTLING ECONOMIC CRISIS NEWS. THE STOCK MARKETS, TANKE

D. REAL ESTATE VALUE, SUN

K. BUT MUCH LESS HAS BEEN SAID ABOUT PROBABLY A MORE PRESSING CONCERN TO MOST WORKERS —YOUR JO

B. IS IT SAFE? HOW LONG WILL IT BE BEFORE YOU CAN EXPECT TO SEE A RAISE OR BONUS AGAIN? 【R1】______ UNFORTUNATELY, THE CREDIT CRISIS HAS ALREADY BEGUN AFFECTING JOB GROWT

H. THE UNEMPLOYMENT RATE HAS GROWN AN ENTIRE PERCENTAGE POINT—FROM 5. LTO 6. 1—BETWEEN MARCH AND AUGUST. FURTHERMORE, IT IS LIKELY TO GET WORSE BEFORE IT GETS BETTER. GOLDMAN SACHS GROUP ECONOMISTS WROTE IN A REPORT TO CLIENTS YESTERDAY THAT THEY EXPECTED UNEMPLOYMENT TO RISE TO SEVEN PERCENT IN LATE 2009. 【R2】______ AT THE OUTSET OF HOUSING MARKET"S TURMOIL, MOST EXPECTED JOBS IN THE BANKING, FINANCE, CONSTRUCTION AND REAL ESTATE SECTORS TO TAKE A DIRECT HIT, AS THE PROBLEMS STARTED IN THOSE AREAS. HOWEVER, NOW IT IS CLEAR THAT THE DAMAGE IS LIKELY TO SPREAD TO OTHER INDUSTRIES, INCLUDING ONES THAT WHO USE CREDIT TO BUY THEIR GOODS OR RELY ON NEW INVESTMENTS TO MOVE FORWAR

D. IN SHORT, MOST OF THE

M. AS FOR THE IT DEPARTMENT, DAVID FOOTE, CEO AT THE IT WORKFORCE RESEARCH CONSULTANCY, TOLD COMPUTERWORLD THIS WEEK THAT HE THINKS MORE COMPANIES WILL BE LOOKING MORE CLOSELY AT THAT PARTS OF IT SPENDING ARE CRITICAL, AND SOME IT WORKERS MAY BE SAFER THAN OTHERS. BUT, OVERALL, HE FINDS LITTLE REASON FOR TECHIES TO WORRY. 【R3】______ HISTORICALLY, MOST DOWNTURNS HAVE SPARED WHITE COLLAR AND HIGHLY-SKILLED WORKERS WHILE HITTING THE LEAST SKILLED THE HARDEST. YET OBSERVERS BELIEVE THAT THIS DOWNTURN IS LIKELY TO BE MORE DEMOCRATIC THAN ONES PREVIOUSLY, BECAUSE OF THE SEVERITY OF THE CREDIT CRUNC

H. "RESEARCH INDICATES THAT EMPLOYERS HIRE RELATIVELY MORE SKILLED WORKERS WHEN THEY INVEST IN NEW PLANT AND EQUIPMENT," ALAN

B. KRUEGER, AN ECONOMIST AT PRINCETON, TOLD THE NEW YORK TIMES THIS WEE

K. "IF FUNDS FOR INVESTMENT ARE NOT AVAILABLE BECAUSE OF THE FINANCIAL CRISIS, HOWEVER, COMPANIES WILL HIRE FEWER SKILLED WORKERS. " 【R4】______ IF YOU"VE JUST RETIRED OR WERE ABOUT TO, SADLY, YOUR TIMING COULD NOT BE WORSE AS BY BEGINNING TO WITHDRAW FROM YOU NEST EGG JUST AS THE MARKETS TUMBLE, YOU ARE ESSENTIALLY LOCKING IN YOUR LOSSES. BUT WHAT IF THE WHEELS OF YOUR RETIREMENT WERE ALREADY IN MOTION? EXPERTS SAY, AS DEPRESSING AS IT SOUNDS, WORKING JUST A FEW YEARS LONGER CAN MAKE A BIG DIFFERENC

E. "IT DOES NOT HAVE TO BE ENTIRELY UNPLEASANT," WRITES NEW YORK TIMES COLUMNIST TARA SIEGEL BENARD, "MAYBE YOU COULD WORK PART TIME AND EARN ENOUGH TO COVER THE AMOUNT YOU WOULD HAVE DRAWN FROM YOUR RETIREMENT PORTFOLIO. AT LEAST YOU ARE NOT DIPPING INTO YOUR SAVINGS WHILE THEY ARE DOW

N. " 【R5】______ THE NEXT LOGICAL QUESTION IS, "WELL, HOW LONG WILL THIS LAST?" AND WHILE NOBODY AGREES ON AN EXACT DATE, FEW HAVE ANY CONFIDENCE THAT IT WILL BE OVER BY THE HOLIDAYS. MANY ARGUE THAT IT WILL BE AT LEAST 30 MONTHS LON

G. IT"S NOT JUST ECONOMISTS AND PUNDITS. ONE READER POLL IN A BUSINESS NEWSPAPER FOUND THE 54 PERCENT OF RESPONDENTS BELIEVED THAT THE RECESSION WOULD LAST THROUGH THE SECOND HALF OF 2009 AND POSSIBLY AS LONG AS 2011.