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问题 单项选择题 A1/A2型题

下述关于类风湿关节炎说法不正确的是（）。

A.是一种可以引起多系统损伤的自身免疫性疾病

B.是一种多基因遗传病

C.是一种可以治愈的疾病

D.女性发病率高，女性患者约是男性的3倍

E.感染因子在触发类风湿关节炎方面可能起重要作用

答案

参考答案：C

解析：类风湿关节炎是一种可以引起多系统损伤的自身免疫性疾病，虽然不能治愈，但可控制症状。

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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单项选择题

分娩期宫口扩张主要靠()

A．子宫收缩力

B．腹压

C．宫腔内压

D．羊膜囊扩张

E．胎先露压迫
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