计算：（1）（2a）3•b4÷12a3b2；（2）x（x+2）-（x+1）（x-

发布时间：2017-05-16 14:32 │ 来源：www.tikuol.com

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问题：

计算：
（1）（2a）³•b⁴÷12a³b²；
（2）x（x+2）-（x+1）（x-1）；
（3）

3	-8

+

(-3)2

-|

3

-2|．

考点：整式的加减乘除混合运算实数的运算

题型：解答题

某粒子的结构示意图为

，若该粒子为阴离子，则n______10（填“＜”、“＞“或“=”）．若该粒子为阳离子，则其对应原子的核外电子层数为______．

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完形填空。

      What's your idea about success? Some people say that beginners have all the luck, while others
believe that success   1 only with practice. In fact, I fell both of these statements (陈述) are not true
all the time. Each is true in some ways 2 not in others.
      For example, I went to a drawing competition many years ago and  3 surprisingly. As a prize,
I got a film ticket to see "Titanic". I was really 4   because it was the first time I had taken part in any
competition, Thinking that I might be lucky again, I  5   joining in other art competitions, 'But the result
was that I 6 won again. I accepted the fact that the other people had a 7  artistic ability than I
did. Art was not something I was especially interested in and I had never practiced the different art skills.
So, the  8 I produced were not of a very high standard.
     These experiences taught me a lot. Though I might have been lucky  9 , I also need to put in hard
work. As we know,  10 makes perfect. So I believe success builds on less luck and chance.

( )1. A. moves
( )2. A. or
( )3. A. won
( )4. A. sorry
( )5. A. tried
( )6. A. often
( )7. A. greater
( )8. A. results
( )9. A. at last
( )10. A. chance

B. comes
B. so
B. began
B. active
B. forgot
B. ever
B. more natural
B. film
B. at most
B. practice

C. returns
C. and
C. failed
C. lucky
C. stopped
C. seldom
C. lower
C. prizes
C. at first
C. difference

D. leaves
D. but
D. ended
D. nervous
D. remembered
D. never
D. more common
D. drawings
D. at least
D. experience

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(四)王某在甲研究所长期从事饮水处理技术及其设备的研制工作。2000年7月，王某利用研究所有关图纸、资料，独自设计了一种饮水净化矿化机。2001年10月，王某辞职到乙矿泉设备厂工作。同年11月乙矿泉设备厂利用王某带来的技术试制成功该饮水净化矿化机，并少量投入试生产。2002年6月，甲研究所就“矿泉水制造方法及其装置”向专利局申请专利，专利局认定专利申请人是甲研究所，对此，王某和乙厂提出异议。请分析案例并回答下列问题：

(2003，78)专利局认定专利申请人是甲研究所而不是王某和乙厂的理由是( )。

A．王某的发明是在本职工作中作出的

B．王某完成发明主要利用了甲研究所的物质技术条件

C．乙厂研制的该产品是王某调动工作后一年内作出的，所以不能获得专利申请权

D．王某与甲研究所就专利申请权没有达成协议

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下列四种因素中对底片的清晰度无任何影响的是（）

A、射源的焦点尺寸

B、增感屏的类型

C、射线的能量

D、底片的黑度

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题型：解答题

“星期美点”由惠如楼首创的。

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