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By definition, heroes and heroines are men and women distinguished by uncommon courage, achievements, and self-sacrifice made most for the benefits of others-they are people against whom we measure others. They are men and women recognized for shaping our nation’s consciousness and development as well as the lives of those who admire them. Yet, some people say that ours is an age where true heroes and heroines are hard to come by, where the very idea of heroism is something beyond us-an artifact of the past. Some maintain, that because the Cold War is over and because America is at peace, our age is essentially an unheroic one. Furthermore, the overall crime rate is down, poverty has been eased by a strong and growing economy, and advances continue to be made in medical science. Cultural icons are hard to define, but we know them when we see them. They are people who manage to go beyond celebrity, who are legendary, who somehow manage to become mythic,. But what makes some figures icons and others mere celebrities? That’s hard to answer. In part, their lives have the quality of a story to tell. For instance, the beautiful young Diana Spencer who at 19 married a prince, renounced marriage and the throne, and died at the moment she found true love. Good looks certainly help. So does a special indefinable charm, with the help of the media. But nothing confirms an icon more than a tragic death—such as Martin Luther King, Jr., John F. Kennedy, and Princess Diana.
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【单选题】— Where are the apples from?  —  ____________ are from Shandong. — Are ___________ sweet?  — Yes, ____________ think so. [     ]
A.
They, they, they
B.
They, you, I
C.
They, they, I
【单选题】_______ are the apples? [     ]
A.
What
B.
When
C.
Who
D.
Where
【简答题】透光率的定义。
【判断题】介质的透射率T定义为入射光强除以透射光强。
A.
正确
B.
错误
【判断题】实际的液压元件或系统能用特定的图形符号来表示和描述。
A.
正确
B.
错误
【单选题】There are two apples here. Where are ____ ?
A.
others
B.
other
C.
the others
D.
another
【简答题】下列关于计算机系统工作原理的叙述中,正确的是( )。 A)中央处理器直接对存储器中的数据进行处理 B)运算器完成解释和执行指令的工作 C)中央处理器可以从输入设备中得到控制指令 D)程序和数据均存放在存储器中
【单选题】— _____________ apples do you have? — Seven. [     ]
A.
How many
B.
How
C.
Where
【单选题】____ in the desk? There are apples in it. [     ]
A.
Who's
B.
What's
C.
Where
D.
Whom's
【多选题】下列关于中央处理器的叙述,正确的是( )。
A.
中央处理器简称CPU,主要由控制器和存储器组成
B.
主频是指计算机能够直接处理的二进制数据的位数
C.
主频越高,CPU的速度越快
D.
CPU是计算机的核心部件,对计算机的整体性能起决定性作用
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