谈谈校本课程的利弊，分析教师在校本课程开发中的作用。
参考答案：
风景摄影的实用技法（）
A.光影
B.结构
C.色彩
D.确定机位
Under a collection, a bank acts only as a collecting agent to（）the exporter in obtaining payment or acceptance of his draft before the release of documents to the importer.
A．guarantee
B．assist
C．promote
D．push
