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参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】工资率上升有收入效应和替代效应，两者的作用方向相反。如果工资率一直增长到使收入效应起主要作用，则劳动供给曲线将：()
A.
向上倾斜
B.
垂直
C.
向下倾斜
D.
向后弯折
【单选题】What is the main aim of book review? （单选）
A.
analyzing a perspective or argues a point
B.
analyzing or discussing researches previously published by others
C.
summaries and comments on a newly published academic book
D.
summaries, reviews and comments the research trends, the major discoveries, significant findings, the leading opinions on a particular subject.