Our (city) (has) (the) (most) beautiful park.

A:city B:has C:the D:most

There would be no air pollution to this city because ______.

A:there was a special plant to treat the polluted air B:the city was away from the mainland C:people in the city did not burn oil or coal D:vehicles there were powered by electricity

What kind of city is Tokyo

A:A historic city. B:A world famous seaport. C:A highly modernized city. D:A most attractive city for tourists.

In selecting the host city, the IOC will consider several factors except ______ .

A:the existing facilities of the city B:the competence of NOC of the city's country C:the city's time zone D:the financial profit by Olympics

Our (city) (has) (the) (most) beautiful park.

A:city B:has C:the D:most

关系模式CSZ（CITY，ST，ZIP）其属性组上的函数依赖集为F=（CITY，ST）→ZIP，ZIP→CITY，关系模式CSZ的主属性是（）。

A:ZIP B:CITY，ST，ZIP C:CITY，ZIP D:ST，ZIP

关系模式CSZ(CITY，ST，ZIP)其属性组上的函数依赖集为F=(CITY，ST)→ZIP， ZIP→CITY，关系模式CSZ的主属性是

A:ZIP B:CITY，ST，ZIP C:CITY，ZIP D:ST，ZIP