计划每天粉刷3间，8天可以完成，实际每天粉刷4间．实际多少天可以完成？

北京某房地产开发公司，具有建筑资质，2009年1月份发生如下业务：
(1) 销售自建商品房一栋，取得销售收入2000万元，其中包括代收城市基础设施配套费、集资兴建锅炉增容费150万元；工程成本460万元，成本利润率10%；
(2) 自己的施工队为本公司建成自用办公楼一栋，施工队与房地产开发公司结算工程价款为3000万元；
(3)自建统一规格和标准的商品房5栋，工程总成本15880万元；销售其自建商品房的3栋，取得销售收入28600万元；另将其中的1栋作为公司的办公楼、1栋抵顶建筑材料价款；当地规定的建筑业利润率为10%；
(4) 2年前以一栋商品房抵押给银行，取得贷款700万元(贷款期限2年，贷款年利率 8%，贷款期间该商品房已给银行使用以抵付利息)。本月贷款到期，该公司元力归还，银行将抵押商品房没收，双方核定该商品房价值850万元，余款银行已支付给房地产开发公司；
(5) 采用还本方式销售商品房，取得收入1500万元，分月发生还本支出50万元。
要求：根据上述资料，按照下列顺序回答问题：

计算销售自建商品住宅应纳营业税额；

阅读理解

     If you go to a fast food restaurant, you will probably see a lot of teenagers. Today, many teenagers are overweight,

and some of this is because of their bad eating habits. Most teenagers love food with a lot of fat, oil, salt, and sugar.

People often call this kind of food "junk food".

     But bad eating habits go beyond fast food. We find many teenagers eat unhealthy. Some don't have breakfast before

they go to school. During the day, some don't have a proper meal for lunch. In a recent survey at one school, scientists

found that over two-thirds of the students didn't follow a healthy diet. They didn't like vegetables, and many of them

didn't like to eat fruits. They perferred to eat food with a lot of salt, sugar, or fat.

     ★ Teenagers shouldn't eat too much junk food.

     ★ Teenagers shouldn't eat food with too much salt. Salt can cause high blood[pressure in the future.

     ★ Teenagers should eat food with less fat, oil, and sugar.

     ★ Teenagers need to eat some fruits and vegetables every day. Fruits and vegetables are rich in vitamins and have

           little fat.

     ★ Teenagers need to drink more milk. Milk will help their bones grow.

     ★ Teenagers need to eat breakfast every day. This is good for their body and mind.

1. "Junk food" contains a lot of __________.

A. milk and sugar

B. fruits and sugar

C. vegetables and salt

D. fat, oil, salt and sugar

2. In a recent survey at one school, scientists found many students liked __________.

A. vegetables

B. unhealthy food

C. fruits

D. healthy food

3. What does the underlined word "beyond" mean in Chinese in t his passage?

A. 超出

B. 不如

C. 相等

D. 在后面

4. In this passage, doctors think that teenagers should eat more __________.

A. food with no vitamins

B. fat and sugar

C. vegetables and fruits

D. salt and oil

5. The best title for this passage is __________.

A. Bad habits

B. Junk food

C. Unhealthy food

D. Advice on healthy eating

若设计双端固定桥修复右下6，此时应重点考虑()

A．右下5选用固位力较弱的固位体

B．增选右下4和5联合做基牙

C．增加桥体的机械强度

D．增加桥体的牙尖高度

E．增加桥体的颊舌径

接近共晶成分的合金，流动性最好。