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【简答题】
When my son, Mark, was in the third grade, he saved all his pocket money for over three months to buy holiday presents. The third Saturday in December Mark said he had made his list and had twenty dollars in his pocket. I drove him to a nearby supermarket. Mark picked up a hand basket and went in while I waited and watched in the car. It took Mark over 45 minutes to choose his presents. Finally he came to the checkout counter and reached into his pocket for his money. It was not there! There was a hole in his pocket, but no money. Mark stood there holding his basket, tears falling down his face.
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举一反三
【判断题】由极值的定义知函数 在点 处取得极小值.
A.
正确
B.
错误
【判断题】“娃娃鱼”是指外形像娃娃的一种鱼。
A.
正确
B.
错误
【单选题】心室律规则的心电图可见于()
A.
心房扑动伴2:1~3:1传导
B.
不完全性干扰性房室脱节
C.
Ⅱ度Ⅰ型房室传导阻滞
D.
心房颤动
E.
Ⅰ度房室传导阻滞
【简答题】'娃娃鱼”是指什么鱼?
【判断题】函数 在点 处取得极小值零.
A.
正确
B.
错误
【简答题】“娃娃鱼”是指 。
【判断题】二元函数 在点 处取得极小值
A.
正确
B.
错误
【单选题】“娃娃鱼”是指( )。
A.
文昌鱼
B.
大鲵
C.
鱼的幼体
D.
虹鳟
【判断题】"娃娃鱼"是指文昌鱼。
A.
正确
B.
错误
【判断题】函数 在点 处取得极小值,且 为该函数的唯一极值点.
A.
正确
B.
错误