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nbsp; D、显示像素的亮度可以多少变化
50、 Word工具栏中的“格式刷”可用于复制文本或段落中的格式，若要将选中的文本或段落中的格式重复应用多次，应该()。
A、 单击“格式刷” B、 双击“格式刷”
Ｃ、 右击“格式刷” D、 拖动“格式刷”
51、 在Word中，插入数学公式在“插入”菜单中应选择的命令是()。
A、 符号 B、图表 C、文件 D、 对象
52、 在Word中，“剪切”命令用于删除选定的内容，并将选定删除的内容放到()。
A、 硬盘 B、Ｕ盘 C、 剪切板 Ｄ、 文档上
53、 在Word中，要显示或隐藏常用工具栏，可使用()菜单。
A、 编辑 B、视图 C、工具 D、 格式
54、 Excel中具有()功能。
A、 制表、图表、数据库 B、 制图、图表、图形
C、 制表、图形、图表、数据库 D、 制表、数据库
55、 在Excel中，选用同一行相邻的两个单元格使他们合并成一个单元格，正确的操作是()。
A、 使用绘图工具中的橡皮工具，删除两个单元格之间的竖线
B、 使用“工具”菜单中的“修订”命令
C、 使用“格式”中的“单元格”命令，然后选中相应选项
D、 使用“编辑”中菜单中的“删除”命令，删除两个单元格中的竖线
英语部分（10分）
Reading Comprehension
Directions:There are two passages in this part、 Each passage is followed by some questions or unfinished statements、 For each of them there are four choices marked A,B,C and D、 You should decide on the best choice、
Questions 56-60 are based on Passage One:
Passage One
A recent study indicates that the “short sleepers” had been more or less average in their sleep needs until the men were in their teens、 But at about age 15 or so, the men voluntarily began cutting down their nightly sleep time because of pressures from school, work, and other activities、 These men tended to view their nightly periods of unconsciousness as bothersome interruptions in their daily routines、
In general, these “short sleepers” appeared ambitious, active, energetic, cheerful, conformist in their opinions, and very sure about their career choices、 They often held several jobs at once, or work fullor parttime while going to school、 And many of them had a strong urge to appear “normal” or “acceptable” to their friends and associates、
When asked to recall their dreams, the “short sleepers” did poorly、 More than this, they seemed to prefer not remembering、 In similar fashion, their usual way of dealing with psychological problems was to deny that the problem existed, and then to keep busy in the hope that the trouble would go away、
The sleep patterns of the “short sleepers” were similar to, but less extreme than, sleep patterns shown by many mental patients categorized as manic、
The “long sleepers” were quite different indeed、 According to the study, these young men had lengthy sleeps since childhood、 They seemed to enjoy their sleep, protected it, and were quite concerned when they were occasionally deprived of their desired 9 hours of nightly bed rest、 They tended to recall their dreams much better than did the “short sleepers”、
Many of the “long sleepers” were shy, anxious, introverted, inhibited, passive, mildly depressed, and unsure of themselves (particularly in social situations)、 Several openly state that sleep was an escape from their daily problems、
56、 According to the study, ()、
A、 many short sleepers need less sleep by nature
B、 many short sleepers are obliged to reduce their nightly sleep time because they are busy with their work
C、 long sleepers sleep a longer period of time during the day
D、 many long sleepers preserve their sleeping habit formed during their childhood
57、 Many “short sleepers” are likely to hold the view that ()、
A、 sleep is a withdrawal from the reality
B、 sleep interferes with their sound judgment
C、 sleep is the least expensive item on their routine program
D、 sleep is the best way to deal with psychological troubles
58、 It is stated in the third paragraph that short sleepers ()、
A、 are ideally vigorous even under the pressures of life
B、 often neglect the consequences of inadequate sleep
C、 do not know how to relax properly
D、 are more unlikely to run into mental problems
59、 When sometimes they cannot enjoy adequate sleep, the long sleepers might ()、
A、 appear disturbed
B、 become energetic
C、 feel dissatisfied
D、 be extremely depressed
60、 Which of the following is NOT included in the passage?()
A、 If one sleeps inadequately, his performance suffers and his memory is weakened、
B、 The sleep patterns of short sleepers are exactly the same as those shown by many mental patients、
C、 Long and short sleepers differ in their attitudes towards sleep、
D、 Short sleepers would be better off with more rest、
Questions 61—65 are based on Passage Two:
Passage Two
As the 21st century begins, a number of leaders in politics, education, and other professions believe that the US must adopt some new values to go along with the old traditional ones、 What new values should Americans adopt? This is a very difficult question to answer、 Certainly, a greater value should be placed on the conservation of natural reasources; Americans should learn to use less and waste less、 But conservation has never been a strong value to Americans, who have believed that their country offered an endless,abundant supply of natural resources、
Recently, progress has been made—more and more Americans are recycling their paper,cans,bottles,and other goods—but old wasteful habit | 
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