价格机制对于保险费率的自发调节只能限于()。A.纯费率 B.附加费率 C.营业费率

This is Jim. He is thirteen. He is from the U.S.A. He is a student. He has a good friend. His name is Jack. Jack is fifteen. He is from Australia. Jack is tall but Jim is short. They are in the same class, but they are in different grades. Jim is in Class Two. Jack is in Class Two, too. They go to school(上学) at seven in the morning and go home(回家) at six in the afternoon.

小题1:Jim and Jack are ____.

A．sisters

B．friend

C．teacher and student

D．from different countries(国家)小题2:Jim and Jack are in ____.

A．the same grade

B．different grades

C．the same color

D．the same family(家庭)小题3:Jack is in ____.

A．Class 4

B．Class 3

C．Class 2

D．Class 1小题4:They go to school at ____ in the morning.

A．6:00

B．7:00

C．7:30

D．8:00小题5:Jim is ____.

A．short

B．tall

C．strong

D．big

书面表达。

下面是你的笔友给你的一封来信。 请你根据信的内容，给你的笔友写一封回信。

要求：意思连贯， 表达正确，语言流畅， 必须充分表达书信中要求所要表达的内容，格式正确。

(你叫李华，住在广东省深圳市红岭路175 号，邮编：518102 日期：2006年8月19 日。)

100 字左右。

Dear…,

     I haven't heard from you for a long time. How are you?

     I have just finished the exams. Now I am glad I have time to write to you. Our teacher tells us that China

is a large country. It has the largest population in the world. It is very far from the USA. It is on the other

side of the world. Now the sun is shining brightly while I am writing to you. But perhaps you are sleeping

in the dark night. How interesting it is! I'm becoming more interested in China. I wish to know more about

your life. Could you tell me what kind of food you often have for meals? Please write me soon!

     Best wishes to you!

                                                                                                                                               yours,

                                                                                                                                               Catherine 

     _________________________________________________________________________________

____________________________________________________________________________________

_____________________________________________________________________________________

关于流感病毒的变异与分型，叙述正确的有（）

A.NP是流感病毒分型的依据

B.禽流感病毒包括甲型流感病毒所有亚型

C.抗原转换与基因突变相关

D.抗原漂移常导致流感大流行

E.抗原漂移常发生在猪体内

根据SSPC-PA2测试干膜厚度时，‘任意点’的测试必须等于或高于规定的最低数值的（）

A.80%

B.70%

C.60%

D.50%

血浆是人体内环境的重要组成部分，其稳态的维持是机体进行正常生命活动的必要条件。请据图回答下列问题：

正常情况下，机体血糖浓度维持在相对稳定状态。由甲图可知，参与机体血糖调节的激素除⑤肾上腺素外，还有②（）和③（）（填写激素名称）。人体内激素作用的结果往往会反过来影响该激素的分泌，这种方式叫做（）调节。