粒细胞缺乏症是指中性粒细胞计数（）。
A.＜15×109／L
B.＜10×109／L
C.＜4×109／L
D.＜1.5×109／L
E.＜0.5×109／L
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| 阅读下列短文，从每题所给的A、B、C和D项中，选出最佳选项。 |
| Arguing with your parents is very natural for teens. From your hairstyle to your friends, your marks at school to your television habits, it might just seem like you argue with your parents about everything. Though this is not pleasant, it is normal and it will most possibly pass. At the same time, remember to argue fairly, respectfully (尊重地) and argue only when needed. It might be hard to stay in control while arguing with parents, but it will do you a lot of good. Arguments between teens and parents generally come about when both parties believe that they know what is best. Parents have been caring for their teens for over ten years, but teens are quickly becoming adults and believe that they are able to take care of themselves. If you are a teen arguing with your parents, remember that your parents love you and only want what is best for you. If you must argue with them, argue fairly, respectfully by: ▲Letting each person in the argument to speak what they want to say. ▲Refusing to break in others when they are speaking. ▲Only Arguing about the topic at hand. Don't talk about past hurts. ▲Showing your parents that you have thought about the issue (事情) and are trying to sort things for yourself. There is a small difference between having a discussion and an argument, but smart teens know that having a discussion with their parents will make things easier. Arguing with parents is usually a hallmark (标记) of the teenaged years, but out of control arguments don't serve anyone well. Before arguing with your parents, decide what type of teen you want to be and what you are willing to do in order to achieve your goals. |
| 1. Why do teens argue with their parents according to the writer? |
[ ] |
| A. Parents and teens have different ideas of what is best. B. Parents don't want their children to grow up. C. Teens don't need their parents' care any more. D. They have different habits. |
| 2. When arguing with parents, teens should do the following EXCEPT__________. |
[ ] |
| A. Let both sides tell what they want to say. B. Show your parents that you have considered the things carefully. C. Keep yourself in control. D. Tell your parents that they have often hurt you before. |
| 3. The underlined word"sort" probably means _____________ |
[ ] |
| A. 处理 B. 类别 C. 占据 D. 放好 |
| 4. We can learn from the passage that_________________. |
[ ] |
| A. having a discussion is better than arguing with parents. B. the arguments between parents and teens will not possibly pass. C. teens will not lose control when arguing with their parents. D. teens should decide whether their parents love them before arguing. |
| 5. What is the best title for the passage? |
[ ] |
| A. Teens and parents B. Discussion with teens C. Arguing with parents D. Teenaged years |
热带沙漠气候的成因主要是 。
A．全年受赤道低压带控制
B．受赤道低压和信风带交替控制
C．常年受副热带高压控制
D．受信风带和副热带高压交替控制
朱自清发表的第一部散文集是( )
A．《背影》
B．《踪迹》
C．《你我》
D．《欧游杂记》
某小型发电机产生的交变电动势为e=10sin10πt（V），对此电动势，下列表述正确的有
A．最大值是
B．频率是10Hz
C．有效值是10V
D．周期是0.2s
高危妊娠的高危因素是指（）。
A.危及孕妇的因素
B.危及胎儿的因素
C.导致难产的因素
D.以上皆对