参与I型超敏反应的Ig是 A.IgG B.IgA C.IgM D.IgD E.IgE

题型:单项选择题

问题:

参与I型超敏反应的Ig是

A.IgG
B.IgA
C.IgM
D.IgD
E.IgE

考点:基础医学医学免疫学免疫球蛋白
题型:单项选择题
若关于x的不等式ax-b>0的解集是(1,+∞),则关于x的不等式
ax+b
x-2
>0
的解集是(  )
A.(-∞,-1)∪(2,+∞)B.(-1,2)C.(-1,2)D.(-∞,1)∪(2,+∞)
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甲、乙二人不约而同在同一商场内行窃,各自盗窃财物数额较大。下列对甲、乙二人行为的认定,正确的是()。

A.甲、乙二人是共同实行犯

B.甲、乙二人互为片面共犯

C.甲、乙二人互为间接正犯

D.甲、乙二人不构成盗窃罪共犯

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免疫浊度试验的基本原则是 ()

A.体系中保持抗原过量

B.体系中保持抗体过量

C.体系中合适的离子强度

D.体系中合适的pH

E.必要时可加入增浊剂

题型:单项选择题

Raising pets is not a new thing in China , but recently it has taken on a new meaning .

As a famous Chinese saying goes, pursuit of petty (小的,不重要的) pleasures weakens one’s will to make progress . The saying has been so popular that even today many people still consider raising pets as a hobby of the idle .

Things have changed much recently and now raising pets has become a popular pastime , resulting in a successful pet care industry .

Pet food is sold in almost all supermarkets and many special stores for pet needs have been set up .

Animal hospitals provide various medical services for sick dogs and cats , and pet exchange fairs are held regularly .

At the China International Pet Show which took place recently in Beijing , more than 100 factories from across the country exhibited their products . Thousands of dealers and pet owners went to the show.

“People’s swollen pockets make it possible for many to raise pets , a hobby that used to be enjoyed only by the wealthy ,” said Wang Wei , who works with the National Kennel Association of China .

Wang Yuyan , vice president of the Small Animals Protection Association , agreed , “ In many films and novels , having a pet is used as a symbol of wealth . That’s not a complete picture . ” Wang added that pets are friends in a real sense of the word , not just playthings . “ Anyone with a loving nature can raise pets . ”

Still the high cost of keeping a pet is something many people have to think about .

“I like dogs and cats , but I have neither time nor money to raise them , ”said Li Jun , in her 40’s , a civil servant from Beijing .

The cost of raising a dog is high in Beijing , where registration (登记) is a must for all dogs and costs 5,000 yuan for each animal . In addition , pet owners must pay for regular injection of vaccines (疫苗). Most of all , dog food is quite expensive .

Unlike his mother , Li Jun’s 10-year-old son, Li Qiyu, dreams of the day he will have his own pet . “I hope I can have a dog in my house , ” he said .

小题1:Things have changed much recently , because ___________ .

A.people have all become kind-hearted

B.small animals have no places to live in

C.people’s living conditions are improving

D.more and more people are out of work小题2: In big cities in China today , raising pets ________ .

A.has changed people’s life

B.has destroyed some families

C.has met much difficulty

D.has brought much business for some people小题3:According to Wang Yuyan’s opinion , raising pets _________ .

A.is a necessary job for us all

B.is harmless for most people

C.should be a hobby of the rich

D.will make the poor happy

题型:单项选择题

简述四色定理的证明过程。

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