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【简答题】
时下，网校教学越来越受到广大学生的喜爱，它已经成为学生们课外学习的一种趋势，假设某网校的套题每日的销售量 （单位：千套）与销售价格 （单位：元/套）满足的关系式 ，其中 ， 为常数.已知销售价格为4元/套时，每日可售出套题21千套. （1）求 的值； （2）假设网校的员工工资，办公等所有开销折合为每套题2元（只考虑销售出的套数），试确定销售价格 的值，使网校每日销售套题所获得的利润最大.（保留1位小数点）
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【简答题】“Who needs a shopping mall if you have ?” said Wang Lin, 28, a writer in Beijing. , China’s largest online shopping site, has become an important part of Wang Lin’s life. She spends lots o...
【简答题】简单蒸馏和间歇精馏的主要区别是 ________ 。
【简答题】“Who needs a shopping mall if you have ?” says Wang Lin,28,a writer in Beijing. , China’s largest online shopping site(网上购物网站), has become an important part of Wang Lin’s life. She spends ...
【简答题】“Who needs a shopping mall if you have ?” says Wang Lin, 28, a writer in Beijing. , China’s largest online shopping site, has become an important part of Wang Lin’s life. She spends lots o...
【单选题】–Taobao is the largest shopping website in China, _________? –Yes, it is very popular now.
A.
is it
B.
isn’t it
C.
are they
D.
aren’t they
【多选题】Photoshop中Ctrl+T是自由变换的快捷键，在有一个选区的情况下，按Ctrl+T键必须依靠快捷键才能够完成下列哪些变换操作。
A.
缩放
B.
旋转
C.
透视变形
D.
扭曲
【简答题】“Who needs a shopping mall if you have ?” says Wang Lin, 28, a writer in Beijing. , China’s largest online shopping site (网上购物站), has become an important part of Wang Lin’s life. She spend...
【单选题】关于文化差异下列说法错误的是
A.
不同的国家、民族、人具有不同的生活和工作模式
B.
各种文化模式都有共同的价值体系和行为准则，与社会环境无关
C.
文化差异的一般的特点可以表现在服装、饮食和语言中
D.
文化差异比较复杂的特点融化在人们的信仰、价值观、思维方式和言行举止中
【简答题】“Who needs a shopping mall if you have ?” says Sarah, 28, a writer in Beijing. , China’s largest online shopping site, has become an important part in Sarah’s life. She spends lots of mone...
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