The writer mentioned "slaughterhouses" because these were the places in which
A. Ford's assembly line originated
B. he made ears
C. he innovated the assembly line
D. he innovated the disassembly line
How Ford Turn Out Cars
When it comes to singling out those who have made a difference in all our lives, you cannot overlook Henry Ford. A historian a century from now might well conclude that it was Ford who most influenced all manufacturing, everywhere, even to this day, by introducing a new way to make cars—one, strange to say, that originated in slaughterhouses.
Back in the early 1900's, slaughterhouses used what could have been called a "disassembly line. " Ford reversed this process to see if it would speed up production of a part of an automobile engine called a magneto. Rather than have each worker completely assemble a magneto, one of its elements was placed on a conveyer, and each worker, as it passed, added another component to it, the same one each time. Professor David of the University of Delaware, an expert on industrial development, tells what happened:
"The previous day, workers carrying out the entire process had averaged one assembly every 20 minutes. But on that day, on the line, the assembly team averaged one every 13 minutes and 10 seconds per person. "
Within a year, the time had been reduced to five minutes. In 1913, Ford went all the way. Hooked together by ropes, partially assembled vehicles were towed past workers who completed them on piece at a time. It wasn't long before Ford was turning out several hundred thousand cars a year, a remarkable achievement then. And so efficient and economical was this new system that he cut the price of his cars in half, to $ 260, putting them within reach of all those who, up until that time, could not afford them. Soon, auto makers the world over copied him. In fact, he encouraged them to do so by writing a book about all of his innovations, entitled Today and Tomorrow. The Age of the Automobile has arrived. Today, aided by robots and other forms of automation, everything from toasters to perfumes are made on assembly lines.
Which of the following statements is NOT true?
A. Henry Ford influenced our lives.
B. Henry Ford influenced all manufacturing.
C. Henry Ford influenced the manufacture of ears.
D. Henry Ford influenced historians.
“把查询sc表和更新sc表的grade列的权限受予用户user1”的正确SQL语句是______。
A. GRANT SELECT, UPDATE(grade)ON TABLE sc TO user1
B. GRANT SELECT sc, UPDATE sc, grade TO user1
C. GRANT SELECT, UPDATE ON TABLE sC.grade TO user1
D. GRANT SELECT ON TABLE sc, UPDATE ON TABLE sc(grade) TO user1
【程序说明】 下列输出乘法口诀的程序,要求输出的格式如下,其中数字之间有3个空格。
* 1 2 3 4 5 6 7 8 9
1 1
2 2 4
3 3 6 9
4 4 8 12 16
5 5 10 15 20 25
6 6 12 18 24 30 36
7 7 14 21 28 35 42 47
8 8 16 24 32 40 48 56 64
9 9 18 27 36 45 54 63 72 81
【程序】
CLEAR
SET TALK OFF
(5)
A=1
DO WHILE A<=9
?? STR(A,4)
A=A+1
ENDDO
A= (6)
DO WHILE A<=9
? STR(A,4)
B=1
DO WHILE B<=A
P= (7)
?? STR(P,4)
B=B+1
ENDDO
A= (8)
ENDDO
SET TALK ON
RETURN
(5)
A. ?“*”
B. ? SPACE(3) +“*”
C. ? SPACE (3)+*
D. SPACE(3) +“*”