企业放宽信用政策,就会使应收帐款增加,从而增大了发生坏帐损失的可能。( )
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定积分只与被积函数和积分上下限有关，与积分变量的符号无关。
A. 对
B. 错
1. Which may be used to greet people you meet for the first time?
A. Hi, how are you?
B. How’s life?
C. Hi, nice to meet you!
D. Well, what’s up?
2. Which ones of the following may be used to talk about your hobby?
A. I really like singing and dancing.
B. I am a big fan of tennis.
C. I am a keen runner.
D. My hobby is playing violin.
教学创新设计的三个要素包含学习目标、教与学和（）。
A. 教育技术
B. 课程大纲
C. 教学资料
D. 评价与反馈
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