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【简答题】
把下面的六个图形分为两类，使每一类图形都有各自的共同特征或规律，分类正确的一项一（ ）
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反馈参考答案：
举一反三
【简答题】We think _____ a pity that he didn’t pass the driving test.
【单选题】李明现场观看NBA勇士队比赛的总效用函数为TU=10Q-Q 2 ,边际效用MU=10-2Q,Q为观看比赛的次数,李明达到效用最大化时,观看比赛的次数是。
A.
10次
B.
20次
C.
15次
D.
5次
【单选题】关于系统误差和偶然误差,描述 错误 的是( )
A.
偶然误差是由偶然因素引起的，因此没有规律
B.
系统误差是由某个或某些经常性的因素引起的，具有单向性和重现性
C.
偶然误差，大小和方向不固定，但大、小误差出现的概率分布服从正态分布
D.
系统误差，重复测定重复出现，因此可以减小和消除
【简答题】The ability to laugh at your own weaknesses and blunders has long been recognized as a sign of maturity. And yet this is one of the most difficult __1__ of your sense of humor to develop. Oscar Wilde ...
【简答题】Erik was a four-year-old boy. He thought he was a young man but his parents didn’t think so. They told him, “When you begin to think about 1 others, you’ll be a young man.” One morning, his parent...
【单选题】He insisted that he suffer from heart trouble, but I didn’t think so.
A.
should suffer
B.
has suffered
C.
suffers
D.
was suffering
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