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【单选题】
对于没有亲缘关系的人而言,HLA抗原属于
A.
异种抗原
B.
改变的自身抗原
C.
隐蔽抗原
D.
同种异型抗原
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【单选题】The leading social media platform currently is:
A.
Twitter.
B.
YouTube.
C.
Facebook.
D.
Instagram.
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A.
For example, social contact can boost development
B.
For example, social contact can boost development of the brain and immune system.
C.
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【单选题】Social anxiety disorder prevents some 15 million Americans from leading normal social and romantic lives, a new survey finds. The disorder leaves many isolated, ashamed and often misdiagnosed. Thirty-...
A.
being left alone
B.
leading normal lives
C.
embarrassing other people
D.
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【多选题】Social factors leading to drug abuse include (multiple choice) :
A.
Availability of addictive substances
B.
Family factors.
C.
Peer influence, peer pressure
D.
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E.
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【单选题】Which of the following is a leading platform for social e-commerce?
A.
Amazon
B.
eBay
C.
Wikipedia
D.
Facebook
【单选题】One reason leading most people to lock their network is______.
A.
their lack of social responsibilities
B.
the lack of technological support
C.
their concerns about security and privacy
D.
the slow speed of the shared network
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