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问题 单项选择题

制备免疫球蛋白Fc片段时，选用的酶为（）

 

A.胰蛋白酶

B.胃蛋白酶

C.碱性磷酸酶

D.木瓜蛋白酶

E.过氧化物酶

答案

参考答案：D

解析：木瓜蛋白酶可将IgG裂解成一个Fc和两个Fab片段。

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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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填空题

客户进行基金定期定额申购、定期定额赎回的相关费率以（）为准。
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