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【单选题】
An open economy is a national economy thatA.
doesn't interact economically with the rest of the world.
B.
has a stock market that is open to traders from anywhere in the world.
C.
has extensive trading and financial relationships with other national economies.
D.
has established diplomatic relations with most other national economies.
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【简答题】The 2019 novel corona virus initially occurred in a group of people with ________ who’d been associated with a seafood market in the city of Wuhan. ( 1’19” )
【简答题】A的平方一定大于2A（A不为0）．______．
【简答题】Examples of rogue corona virus: virus in 2002 and 2003, the virus as well as the new firstly detected in Wuhan.
【简答题】Health authorities in Wuhan, Hubei province on Monday confirmed 136 new cases of pneumonia caused by a novel corona virus strain in the city.
【判断题】会展展品不同于一般商品，一般在展会上展出的展品，很多都是参展商新开发设计的新产品，在技术、性能、质量等方面部比较优异。因此在整个流通过程中，尤其在物流过程中，更要求安全性和物流服务的专业性。()
A.
正确
B.
错误
【简答题】Worldwide, Japan has reported one corona virus infection linked to the viral outbreak that originated in Wuhan and Thailand has confirmed two infections.
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