题目内容

Complete these sentences with the words or phrases in the box.a quarter of crime high quality of lifesimilar tocapital heatisland temperature1. Iceland is a(n)________________, but it is also a country.2. About _____________________ a million people live in Iceland.3. Iceland’s language is ________________ German.4. In Iceland, people use hot water from the ground to ________ their homes.5. There are few people in prison in Iceland because there is almost no _____________.6. Icelanders like a(n) _______________________, so they work very hard.7. Reykjavik is the ____________________ of Iceland.8. In winter, the _____________________ in Reykjavik is the same as in New York City.

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创建主键约束的时候,主键只能绑定到表的一个列上。

A. 对
B. 错

完成课本案例7的程序的编写,并将代码及结果上传。希望同学们能够通过此案例掌握自增与自减的用法与含义。

Venice is a unique city because it ______________.

A. is made of islands on the water
B. has many older residents
C. is expensive for people to live in
D. has millions of tourists

Venice is changing because _________________.

A. it has many problems
B. everything comes to the city by boat
C. it has so many tourists
D. everything is too expensive

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