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【单选题】
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.
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【简答题】自由基聚合的主要聚合方法?
【简答题】能实现可控/“活性”自由基聚合的方法主要有?
【单选题】山中さんはまじめ__優しい人ですよ。
A.
B.
C.
D.
【简答题】自由基聚合的方法: , , , 。
【单选题】根据《建设工程施工现场供用电安全规范》(GB 50194-2014)规定,关于TN-C-S系统,说法错误的有()。
A.
在电源处应将 PEN 分离成 N 和 PE ;
B.
PE 汇流排和中性线汇流排应跨接;
C.
在总配电箱处 PE 汇流排应与接地装置直接连接;
D.
在总配电箱处应将 PEN 分离成 N 和 PE ;
【单选题】下列关于自由基聚合方法说法错误的是
A.
有四种基本聚合方法:本体聚合,溶液聚合,悬浮聚合,乳液聚合
B.
本体聚合和溶液聚合都需要选择油溶性引发剂
C.
乳液聚合和悬浮聚合通常选择水溶性引发剂
D.
乳液聚合四种基本组成是:水、单体、引发剂和乳化剂
【单选题】自由基聚合实施方法中,可以同时提高聚合速率和聚合度的方法是()
A.
悬浮聚合
B.
乳液聚合
C.
溶液聚合
D.
本体聚合
【简答题】自由基聚合的方法有______,离子型聚合的方法有______。
【单选题】关于TN-C-S系统,说法错误的有( )。
A.
在电源处应将保护接地中性导体(PEN)分离成中性导体(N)和保护导体(PE)
B.
保护导体(PE)汇流排和中性线汇流排应跨接
C.
在总配电箱处保护导体(PE)汇流排应与接地装置直接连接
D.
在总配电箱处应将保护接地中性导体(PEN)分离成中性导体(N)和保护导体(PE)
【单选题】I will stay in the hotel there is some news about the missing girl.
A.
in case
B.
in case of
C.
if only
D.
unless
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