世界上最毒的蝎子是()。
参考答案:巴勒斯坦蝎
5. Which of the following is TRUE according to the information in the form?
A.Australia isn’t English-speaking countries.
B.Rome is a city in Southern Europe.
C.Canberra is the capital of Italy.
D.London has a population of 56 million.
用树结构表示实体类型及实体间联系的数据模型称为 【2】 。