皮皮学，免费搜题
登录
搜题
【单选题】
有一学生选课关系:学生选课(,课程号,成绩),如果要提高按课程查询学生成绩的效率,应该建索引的属性是 。A.
（，课程号）
B.
课程号
C.
D.
成绩
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】A unique selling proposition is a feature of a product that ______.
A.
attracts consumers in the market
B.
is highlighted in advertisements
C.
satisfies customer needs
D.
makes it different from other similar products
【单选题】The unique feature of geriatric nursing in Germany is:
A.
Home-based care services
B.
Attach importance to the "surplus capacity" and "personal needs" of the elderly, forming personalized care plan.
C.
Care for kids not for aging
D.
Complete the international qualification certification quickly.
【简答题】The Air Waybill is the most important document in air cargo transportation．It serves as（ ）．
【简答题】What is the unique feature of Chinese food?
【多选题】The Air Waybill is the most important document for a batch of air cargo transportation. It serves as( )．
A.
receipt and delivery of shipment
B.
evidence of contract of air cargo transportation
C.
customs declaration
D.
document of title
相关题目：