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【单选题】
耶克斯和多德森在研究动机强度和学习效率之间的关系时发现（ ）。A.
动机越低，学习效率越高
B.
动机越高，学习效率越高
C.
任务难度不同，其最佳动机强度不同
D.
任务难度不同，其最佳动机强度相同
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反馈参考答案：
举一反三
【单选题】Helen had to shout_____.
A.
making herself
B.
to making herself hear
C.
making herself heard
D.
to make herself heard
【简答题】Helen had to shout _______ above the sound of the music. A． herself hear B．to make herself hear C． herself heard D．to make herself heard
【单选题】享受国家奖助学金学生初审名单经学生处组织复核无异议后报( )学校学生资助工作领导小组审定,并在全校公示,公示时间不少于3-5日
A.
学校学生资助工作领导小组
B.
教务处
C.
结业
D.
院办
【单选题】Helen had to shout _____ above the sound of the music. [ ]
A.
to make herself hear
B.
making herself hear
C.
to make herself heard
D.
making herself heard
【简答题】填写8位数商品编码: 草莓蛋挞( )
【单选题】Helen had to shout ______ above the sound of the music.
A.
making herself hear
B.
to make herself hear
C.
making herself heard
D.
to make herself heard
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