A．F=R=NULL B．F=R C．R-F=1 D．PI=NULL且R=NULL

《证券市场禁入规定》对有下列（）情形的，可以对有关责任人员采取终身的证券市场禁入措施。

A．行为恶劣、严重扰乱证券市场秩序、严重损害投资者利益或者生重大违法活动中起主要作用等情节较为严重的

B．严重违反法律、行政法规或者中国证监会有关规定，构成犯罪的

C．违反法律、行政法规或者中国证监会有关规定，行为特别恶劣，严重扰乱证券市场秩序并造成严重社会影响，或者致使投资者利益遭受特别严重损害的

D．组织、策划、领导或者实施重大违反法律、行政法规或者中国证监会有关规定的活动的

已知a，b∈R，则使|a|+|b|≥1成立的一个充分不必要条件是（　　）

A．|a+b|＜1

B．a≤1，且b≤1

C．a＜1，且b＜1

D．a²+b²≥1

阅读短文，根据要求完成下面各小题。

     (3)Mary is reading something about how to keep healthy on the internet.

Good sleep is important for your health. You need about eight hours' sleep

a night. Don't eat or read in bed. A cup of milk before sleeping may help

you get a good sleep. Go to bed at the same time before midnight and get

up at the same time every morning. For more information, please visit

www.sleeeping.com.

     How often do you exercise? If you want to stay health, try to exercise for

30 minutes a day, three or four times a week. For more information, please

call Health Line at 180-2000.

     Studies show that the cold or flu virus can live on our hands for long. So

you should wash your hands often with soap and water. If you want to know

more, please call Health Line at 180-1313.

     (4)Brush your teeth twice a day and see a dentist at least once a year. The

oral examination is not only for the health of teeth, but also for the whole body.

Please visit www.mydr.com for more information.

A.根据短文内容简要回答下列问题:

1. What should we do every day if you want to get a good sleep?

______________________________________________________

2. What can you do if you want to learn more about flu?

______________________________________________________

B.将短文中划线的两个句子译成汉语.

3.________________________________________________________

4. ________________________________________________________

C.请你给短文拟一个适当的标题.

5. _________________________________________________________

颈外动脉的两个终末支是（）。

A.面动脉和上颌动脉

B.上颌动脉和颞浅动脉

C.椎动脉和脑膜中动脉

D.枕动脉和舌动脉

E.颞浅动脉和面动脉

根丝体