东汉末年开始内迁的少数民族主要有_________________。

形成牙髓的结构是（）

A.成釉器

B.牙 * *

C.牙囊

D.牙板

E.前庭板

阅读理解。

     Ann was on her first package trip in Rosas, Spain.

     At the hotel, she checked in, and then went to her room to change before dinner. She was just ready to

go downstairs when she found that her Spanish money wasn't in her handbag. She carefully looked in all

her luggage, but she couldn't find it. All she had was a small purse with ten English pound notes in it!

     Ann found a place to change her English money. She had very few pesetas (西班牙货币单位), and she

would be here for two weeks. On her way back to the hotel, Ann bought some cheese, some bread and

some oranges. When she got back, she told the manager that her doctor had told her not to eat Spanish food;

she'd just have breakfast each day. That was all right, as she knew the price of hotels included breakfast.

     For the rest of her holiday, Ann swam in the hotel swimming pool, or lay on the beach and got a sunbath.

When the other tourists went to interesting places, she always said she wasn't well. In fact, her holiday wasn't

bad, except that she was always hungry. After all, a piece of fruit for lunch, and bread and cheese for supper

isn't very much.

     Late in the afternoon of their last day, a girl, Jane, asked her why she never ate with them in the hotel

restaurant. Ann told her about her money problems. Jane looked at her for a minute, and then said, "But didn't

you know? The price of this holiday includes everything!"

1. "A package trip" probably means ____.

A. a free trip

B. a long journey

C. a pleasant trip

D. a trip that includes the cost of all the tickets and services

2. Ann didn't eat dinners in the restaurant of the hotel because ____.

A. she was afraid that she couldn't pay for them with her little money

B. her doctor told her not to eat them

C. she wasn't well

D. she wasn't hungry

3. Why did Ann buy some cheese, some bread and some oranges?

A. Because they were good for her health.

B. Because she planned to eat them instead of lunch and supper.

C. Because she liked them more than dinners in the hotel restaurant.

D. Because she is afraid that she couldn't eat enough in the hotel restaurant.

4. What could be the best title of this passage?

A. A Pleasant Trip

B. Everything Included

C. A Foolish Girl

D. Free Dinners

压缩启动前无需生注润滑油。

施工企业经营租赁设备比购买设备的优越性有（）。

A.可以改善自身的股权结构

B.可获得出租方良好的技术知识

C.不必承担设备维修和管理的责任

D.可避免通货膨胀和利率波动的冲击