用天平称得一个空烧杯的质量为34.5g,向烧杯中倒入90cm3的盐水后,重新称量

题型:填空题

问题:

用天平称得一个空烧杯的质量为34.5g,向烧杯中倒入90cm3的盐水后,重新称量,待天平刚好平衡时,右盘中有100g、20g、10g、5g的砝码各1个,游码所对应的刻度是0.5g,则烧杯内盐水的质量是_______,盐水的密度是_________kg/m3

考点:液体密度的测量质量的测量,天平的使用
题型:填空题

阅读理解。

     When people travel in another city or country, they sometimes stay in the homes of the local people.

This is called homestay. It is a great experience because you can meet people from a different country

or city and learn something new about that place. I am Wan Li from China. I came to the UK with my

friends for a short visit. we are living with an English couple, Mr. and Mrs.Green, in the west of London.

They have a wonderful four-bedroom house. This is a new house. It has two bathrooms and a garden

with many beautiful flowers. I have a bedroom of my own.

     There are some shopping centres and restaurants near the house, and the house is close to an under-

ground station. It takes about thirty minutes to get to the centre of London.

     I think a homestay may be a good choice for you if it is your first time to visit abroad. The local people

are friendly and willing to help. If you happen to celebrate the holidays with them, you will get to know

more about western culture and customs.

1. The underlined word homestay in the passage means _____.

A . Stay at home.

B. Stay in the homes of one's friends

C . Stay in the homes of one's relatives

D. Stay in the homes of the local people.

2. Wan Li and his friends live with _____ in London.

A. Mr. and Mrs. Bush

B. Mr. and Mrs. Green

C. Mr. and Mrs.

D. Mr. and Mrs. Brown

3. There is _____ near the house.

A. a bus station

B. an underground station

C. a train station

D. an airport

4. How long does it take Wan Li to get to the centre of London from the west of London?

A. Thirty minutes.

B. Thirteen minutes.

C. Twenty minutes.

D. Forty minutes.

5. When travelers to the Great Britain happen to celebrate the holidays with the local people they will

learn more about _____.

A. western culture and customs

B. world culture and customs

C. eastern culture and customs

D. southern culture and customs

题型:填空题

设X~N(0,9),则P(|X|<3)=( )。

A.Ф(3)

B.Ф(1)

C.Ф(1)-Ф(-1)

D.Ф(1)+Ф(-1)

E.2Ф(1)-1

题型:填空题

关于货物集中招标管理模式,下列叙述不正确的是( )。

A.多应用于政府采购
B.标包划分灵活性低
C.吸引较多具备实力的投标人参与竞争 D.能够发挥规模效益的特点

题型:填空题

提高社会治理效能,促进个人与社会同步发展。要求之一就是要提供高效的社会服务,下列关于社会服务的主要手段说法错误的是()。

A.公共管理

B.公共资源

C.公共需求

D.公共服务

题型:填空题

工业项目所需行政办公及生活服务设施用地面积不得超过工业项目总用地面积的( )。

A.5%
B.30%
C.7%
D.10%

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