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问题 单项选择题

能够用紫外光擦除ROM中程序的只读存储器称为（）。

A.掩膜ROM

B.PROM

C.EPROM

D.EEPROM

答案

参考答案：C

单项选择题

办公室主任：本办公室不打算使用循环再利用纸张。给用户的信件必须能留下好的印象。不能打印在劣质纸张上。
文具供应商：循环再利用纸张不一定是劣质的。事实上，最初的纸张就是用可回收材料制造的。一直到19世纪50年代，由于碎屑原料供不应求，才使用木纤维作为造纸原料。
以下哪项最为恰当地概括了文具供应商的反驳中存在的漏洞

A．没有意识到办公室主任对于循环再利用纸张的偏见是由于某种无知
B．使用了不相关的事实来证明一个关于产品质量的断定
C．不恰当地假设办公室主任了解纸张的制造工艺
D．忽视了办公室主任对产品质量关注的合法权利
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阅读理解
阅读理解。
     Have you ever rubbed your hands together when they get cold? Why do we do that? We do that for
friction. Friction happens when two things that aren't very smooth rub together to make heat energy. The
faster you rub two things together, the more friction (and heat) you can make. Let's discover friction!
WHAT YOU'LL NEED:
      ● Soap     ● Water    ● Your hands!
WHAT TO DO:
     1. Make sure your hands are dry.
     2. Rub your hands together until you feel the heat of your hands.
     3. Now, use soap and water to get your hands very slippery (滑的).
     4. Try to make friction happen while your hands are slippery.
     5. Please write down what has happened.
LET'S TALK!
     Friction is an energy that happens when two things rub together. When friction happens,
it makes heat! When your hands are slippery, they won't make very much friction and your
hands won't get so hot.
DID YOU KNOW? 
     1. Friction happens when you stop your fast running bike.
     2. Ancient people made fires by rubbing two pieces of wood together. Friction happened
though they didn't know it. 
_________    
     Friction is everywhere. Have you ever noticed situations where friction is happening?
If not, ask your parents to take you out in a car. If it is not too hot, touch the tires (轮胎)
of the car before and after a short drive to see how much warmer they get from friction.
1. You'd better make your hands ________ to get heat when you rub them.
A. slippery
B. dry
C. wet
D. smooth
2. What does the word "friction" in this text mean in Chinese?
A. 摩擦
B. 冷却
C. 膨胀
D. 震动
3. ________ is NOT an example of friction.
A. Bike riding
B. Car driving
C. Hands rubbing
D. Friction discovering
4. What's the last column (栏目)?
A. THINK IT OVER!
B. WHAT HAPPENED?
C. EVERYDAY ACTION:
D. WORK WITH PARENTS!
5. This text is most probably ________.
A. a science report
B. a car advertisement
C. a rubbing introduction
D. a chemistry programme
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