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【单选题】
When Mr. David retired(退休), he bought a small house in a village near the sea. He liked it and hoped to live a quiet life in it. But to his surprise, many visitors came to see his house in summer holidays, for it was the most interesting building in the village. From morning to night, there were visitors outside the house. They kept looking in to the rooms through the windows and many of them even went into the house. He decided to drive the visitors away. So he put a notice on the window. The notice said,“If you want to satisfy your curiosity(好奇心),come in and look around. Price: twenty dollars.”Mr. David was sure that the visitors would stop coming, but he was wrong. More and more visitors came and Mr. David had to spend every day showing them around his house. “I came here to retire, not to work as a guide(导游)”, he said angrily. In the end, he sold the house and moved away.Mr. David’s house was that many visitors came to see it.
A.
so small
B.
so quiet
C.
so interesting
D.
such interesting
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【判断题】任何一项经济业务员的发生都不会破坏恒等式的平衡关系,只会使资产和权益总额发生同增同减的变化。
A.
正确
B.
错误
【简答题】在电导法测定乙酸乙酯皂化反应的速率常数实验中,需用电导水,并避免接触空气及灰尘杂质的落入,为什么?
【单选题】测定乙酸乙酯与氢氧化钠皂化反应速率常数的实验中,主要使用了( )仪器。
A.
酸度计
B.
阿贝折光仪
C.
分光光度计
D.
导电率仪
【单选题】测定乙酸乙酯与氢氧化钠皂化反应速率常数的实验中,乙酸乙酯与氢氧化钠溶液混合瞬间,混合液的初始电导如何测定( )。
A.
将与乙酸乙酯溶液等体积的氢氧化钠溶液迅速倒入乙酸乙酯溶液并混匀,所测定的电导(乙酸乙酯与氢氧化钠浓度相同,均为 0.02M )
B.
将与乙酸乙酯溶液等体积的蒸馏水迅速倒入乙酸乙酯溶液并混匀,所测定的电导
C.
将与氢氧化钠溶液等体积的蒸馏水迅速倒入氢氧化钠溶液并混匀,所测定的电导
D.
以上各项都可以用来确定混合液的初始电导
【简答题】外感表证的发热特点是
【判断题】如果需求是弹性的,那么提高运价会使销售收入增加。
A.
正确
B.
错误
【简答题】在电导法测定乙酸乙酯皂化反应的速率常数实验中,测定K t 和K ∞ 时一定要用双管电极,是否可用试管替代?
【简答题】乙酸乙酯皂化反应速率常数的测定实验中, 为什么使用浓度相同的两种反应物?
【判断题】任何一项经济业务的发生都不会破坏恒等式的平衡关系,只会使资产和权益总额发生同增同减的变化
A.
正确
B.
错误
【单选题】以下关于构造函数的描述错误的是
A.
构造函数可以有返回值类型。
B.
构造函数是类的一种特殊函数,它的方法名必须与类名相同。
C.
构造函数的主要作用是完成对类的对象的初始化工作。
D.
一般在创建新对象时,系统会自动调用构造函数
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