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问题 选择题

下列物质间的转化不能一步实现的是

A．NaNO3→Na2SO4

B．CuO→CuCl2

C．Zn→ZnSO4

D．BaCl2→BaSO4

答案

A

CuO加盐酸可以生成CuCl2，Zn加硫酸可以生成ZnSO4，BaCl2加硫酸可以生成BaSO4，而硝酸盐和钠盐都溶于水，所以不可能变成硫酸钠，故选A

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British Study Tours
Using the wonderful railway system we offer an
unusual holiday, sport and study programme.
Your hotel is a train; eat and sleep on the train
and spend each day in a different part of Britain.		Summer School in France
We offer (提供) summer schools for students
between the ages of 12 and 16. Live with a French
family and choose from different activities such as
horse-riding, football, swimming and skiing.
Summer in Australia
We will offer a programme for your students.
All our lessons take place at the college in
Sydney. Morning classes are held in Chinese;
evening classes on Australian history are in
English. We offer an exciting programme of
evening activities such as music, dance and
theatre.		Holiday Programmes in Germany
We offer morning classes in German at all levels
from beginners upwards. In the afternoon you are
free to join in our mountain walks or to go shopping
in the nearby town. In the evening we
organize a full programme for fun. All ages welcome.
1. If you like travelling by train, you can go to _____.
A. Summer School in France
B. Summer in Australia
C. Holiday Programmes in Germany
D. British Study Tours
2. If you want to make your English better, which programmes will you choose?
A. Holiday Programmes in Germany and British Study Tours.
B. Summer in Australia and Summer School in France.
C. British Study Tours and Summer in Australia.
D. Summer School in France and Holiday Programmes in Germany.
3. This passage was written to _____.
A. encourage people to have a holiday
B. introduce some beautiful places
C ask people to study foreign languages
D. attract people to take part in their programmes
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单项选择题

下列哪一个物理组件包含计算机的基本电路和元件？（）

A.子板

B.逻辑板

C.背板

D.母板（主板）
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