据美国《世界日报》综合报道，媒体早前报道指出，中国“十一”国庆60周年前夕，美

根据短文内容，完成下面各题。

    The Internet has become an important part of teenage life. Most of them use the Internet to get lots of

knowledges and information, and to relax in their spare time. The teenagers keep in touch w  1   their friends

online. It is cheaper than phoning someone far away and e-mail is also much q  2   than ordinary mail. 

    But some teenagers are not using it in a good way. Many would find life difficult without it. Many teenagers

spend too much time online. Some of the students who used to do w  3   at school are now failing in exams

because now they spend all their time p  4   games online.

    It is important that you use the Internet in a proper manner. Teenagers should learn h  5   to use the Internet

for study and keep away from bad websites.

    Teenagers should make sure that surfing the Net doesn't take the place of their homework or being with

their friends.

A. 根据短文内容及首字母提示,写出所缺单词。 

    1. ________ 2. ________ 3. ________ 4. ________ 5. ________

B. 根据短文内容，判断正(T)误(F)。

    ( )6. Most teenagers use the Internet to get lots of knowledges and information.

    ( )7. The teenagers don't like keep in touch with their friends online.

    (     )8. All the teenagers are using the Internet in a good way.

    (     )9. Some of the students spend too much time online.

    (     )10. Teenagers should make sure that the Internet can't take the place of everything.

划分流感病毒型的依据之一是（）。

A．核蛋白抗原

B．神经氨酸酶抗原

C．血凝素抗原

D．核酸类型

E．培养特性

肺癌中恶性程度最高的是（）

A.鳞癌

B.腺癌

C.细支气管肺泡癌

D.小细胞癌

E.大细胞癌

关于脑死亡诊断标准错误的是（）。

A.过深昏迷，对外界刺激无任何反应，无任何自发性运动

B.自主呼吸停止，须用呼吸机维持换气

C.脑干反射消失，持续时间至少12小时

D.脑电图呈直线，至少维持12小时

E.腱反射、腹壁反射可存在

简述投入式液位计的测量原理？