环形是轴对称图形，它有无数条对称轴．______．

42岁妇女，月经周期延长，约2个月来潮1次，经期8～10日，经量多。为确诊生殖内分泌失常类型，在月经来潮前4日检查，最有价值的辅助检查方法应是（）

A.测尿孕二醇值

B. * * 脱落细胞学检查

C.宫颈黏液涂片干燥后镜下检查

D.子宫内膜活组织检查

E.测基础体温

You ________ hand in your writing homework next Monday. 　　

 [ ]

A. are supposed　　

B. are supposing 　

C. are supposed to　　　

D. will suppose to

阅读理解。

    Both my parents came from towns in Mexico. Then I was born in El Paso, Texas,

and when I was four, my family moved to a housing project in East Los Angeles.

    Even though we struggled to make ends meet, my parents stressed to me and my

four brothers and sisters how fortunate we were to live in a great country with limitless

opportunities. They influenced us with the concepts of family, faith and nationalism.

    I got my first real job when I was ten. My dad injured his back working in a cardboard-

box factory and was retrained as a hairstylist. He rented space in a little shopping mall

and gave his shop the fancy name of Mr Ben's Coiffure.

    The owner of the shopping center gave Dad a discount on his rent for cleaning the

parking lot three nights a week, which meant getting up at 3 a.m.. To pick up rubbish,

Dad used a little machine that looked like a lawn mower. Mom and I emptied garbage

cans and picked up litter by hand. It took two to three hours to clean the lot. I'd sleep

in the car on the way home.

    I did this for two years, but the lessons I learned have lasted a lifetime. I acquired

discipline and a strong work ethic (道德), and learned at an early age the importance of

balancing life's competing interests-in my case, school, homework and a job. This really

helped during my senior year of a high school, when I worked 40 hours a week flipping

burgers at a fast-food joint while taking a full load of college preparation courses.

    The hard work paid off. I attended the US Military Academy and went on to receive

graduate degrees in law and business from Harvard. Later, I joined a big Los Angeles

law firm and was elected to the California State Assembly (州议会). In these jobs and

in everything else I've done, I have never forgotten those nights in the parking lot. The

experience taught me that there is dignity in all work and that if people are working to

provide for themselves and their families that is something we should honor.

1. Before my father got injured，we _____. [ ]

A. didn't like living in the USA

B. lived a poor but happy life

C. were lucky to move to the USA

D. had many ways to make money

2. When he recovered，to make a living my father _____. [ ]

A. ran a small shopping mall

B. did a part-time job

C. worked as a barber

D. became a street cleaner

3. Working in the parking lot for two years had taught me _____. [ ]

A. how to obey school discipline

B. how to do two things well at a time

C. that discipline and work were of equal value

D. that I must do as many things as possible at a time

4. The author tells us in the last paragraph that we should be proud of those who _____. [      ]

A. have done all kinds of jobs

B. are cleaning the parking lot

C. have achieved a lot in their lives

D. are bearing their responsibilities

患者，女性，56岁。双侧腮腺肿大，口、眼干燥5年，类风湿关节炎3年，口内导管口无唾液分泌。该患者行唇腺活检支持舍格伦综合征的表现，其镜下主要表现为

A．无明显组织病理学改变
B．大量散在淋巴细胞浸润
C．大量单核细胞浸润
D．明显的组织变性、坏死
E．局灶性淋巴细胞浸润

试述“天赤道”和“天极”的概念