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【单选题】
In America, where labour costs are so high, 'do-it-yourself' is a way of life. Many people repair their own cars, build their own garages, even remodel their own houses. Soon they may also he writing their own books. In Hollywood there is a company that publishes children's books with the help of computers. Although other book companies also publish that way, this particular company is very unusual. It 'personalizes' the books by having the computer make the reader the leading character in the story. Here is how they do it. Let us say your child is named Jenny. She lives on Oak Drive in St Louis, has a dog named Spot, a cat named Tabby, and three playmates whose names are Betsy, Sandy, and Jody. The computer uses this information to fill out a story that has already been prepared and illustrated.. The story is then printed with standard equipment as a hardcover book. A child who receives such a book might say, 'This book is about me', the company therefore calls itself the 'Me-Books Publishing Company'. Children like the me-books because they like to see in print their own names and the names of their friends and their pets. But more important, 'personalization' has been found to be an important tool in developing enthusiasm for reading. Me-books are thus helping a child to learn how to read, by appealing to that natural desire to see his own name in print. In America, people do most things by themselves because ______.
A.
they don't trust others
B.
they can do better than others
C.
nobody is ready to help
D.
it is expensive to hire labor
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【单选题】已知NH 3 (g)的 =-46kJ·mol -1 ,H—H键能为435kJ·mol -1 ,N≡N键能为941kJ·mol -1 ,则N—N键的平均键能(kJ·mol -1 )为(    )
A.
-390    
B.
1169
C.
390      
D.
-1169
【单选题】救援过程中,救援人员需与安全气囊保持安全距离:驾驶座安全气囊为()cm,副驾驶安全气囊为()cm。
A.
10 30
B.
20 40
C.
30 50
D.
30 70
【单选题】请说出西班牙语中表示之后的连接词?
A.
primero
B.
segundo
C.
luego
D.
por último
【简答题】与驾驶人安全气囊保持­­ ­­­ ____cm的距离可以让自己处于­­ ­­­ ____安全的区域。
【单选题】下面传感器哪个不是内光电传感器()。
A.
光电管
B.
光敏三极管
C.
光敏电阻
D.
光敏二极管
【单选题】教育背景主要体现职业技能中的哪种能力()
A.
专业知识技能
B.
可迁移技能
C.
自我管理技能
D.
通用技能
【判断题】当牙缺失后,上下颌骨的改变主要是牙槽嵴的萎缩
A.
正确
B.
错误
【单选题】党的( )立足于中国已经解决温饱、人民生活总体达到小康水平的基础,进一步提出了全面建设小康社会的构想。
A.
十四大
B.
十五大
C.
十六大
D.
十七大
【简答题】拆开1 mol H—H键,1 mol N—H键,1 mol N≡N键分别需要吸收的能量为436 kJ,391 kJ,946 kJ。则1 mol N 2 生成NH 3 _1____热量(填“吸收”或“放出”) _2__ kJ;理论上,每生成1 mol NH 3 __3_热量(填“吸收”或“放出”) 4 kJ;事实上,反应的热量总小于理论值,为什么?_________5________________...
【单选题】已知断开或形成1 mol化学键吸收或放出的能量称为化学键的键能,如H—H键的键能为436 kJ·mol -1 ,N≡N键的键能为945 kJ·mol -1 ,N—H键的键能为391 kJ·mol -1 。则下列有关工业合成氨反应的热化学方程式正确的是          (  )
A.
N 2 (g)+3H 2 (g) 2NH 3 (g) ΔH=-93 kJ·mol -1
B.
N 2 (g)+3H 2 (g) 2NH 3 (g) ΔH=+1471 kJ·mol -1
C.
N 2 (g)+3H 2 (g) 2NH 3 (g) ΔH=+93 kJ·mol -1
D.
N 2 (g)+3H 2 (g) 2NH 3 (g) ΔH=-1471 kJ·mol -1
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