题目内容
（请给出正确答案）
[单选题]
下列语句为列出rID为’00001’和rID为’00002’的reviewer所评分过的不同电影ID，空白处应该填写（） SELECT mID FROM Rating WHERE rID = ‘00001’ ____ SELECT mID FROM Rating WHERE rID = ‘00002’
A.EXCEPT
B.UNION
C.INTERSECT
D.DIVID
提问人：网友黄平
发布时间：2022-01-07
如搜索结果不匹配，请 
a.软件技术支持服务：
b.柏油或水泥生产;
c.电影业;
d.癌症研究;
e.本材采伐。
Which of the following goods or services would be most likely to be subject to (1) external economies of scale and (2) dynamic increasing returns? Explain your answers.
a.Software tech -support services
b.Production of asphalt or concrete
c.Motion pictures
d.Cancer research
e.Timber harvesting
