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听力原文： There was once a man in South America who had a parrot, a pet bird that could imitate speech. The parrot was unique. There was no bird like him in the whole world. He could learn to say any word except one. He could not say the name of his native town, Ketunnel. The man did everything be could to teach the parrot to say Ketunnel, but he never succeeded. At first he was very gentle with the bird. But gradually, he lost his temper. 'You stupid bird. Why can't you learn to say that one word? Say Ketunnel or I will kill you. 'but the parrot would not say it. Many times the man screamed, 'Say Ketunnel or I will kill you. 'but the bird would never repeat the name. Finally, the man gave up. He picked up the parrot and threw him into the chicken house. 'You are even more stupid than chickens.' In the chicken house, there were four old chickens, waiting to be killed for Sunday's dinner. The next morning, when he went out to the chicken house, the man opened the door. He was shocked by what he saw. He could not believe his eyes and ears.. On the floor lay three dead chickens. The parrot was screaming at the fourth, 'Say Ketunnel, or I'll kill you.' Why did the man lose his temper?A.
Because the bird couldn't repeat his master's name.
B.
Because the bird screamed all day long.
C.
Because the bird uttered the wrong word.
D.
Because the bird failed to say the name of the town.
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【多选题】今有一氯化钠溶液，测得凝固点为-0.26℃，下列说法正确的是（Kf=1.86 K·kg·mol-1）
A.
此溶液的渗透浓度为 140 mmol·L -1
B.
此溶液的渗透浓度为 280 mmol·L -1
C.
此溶液的渗透浓度为 70 mmol·L -1
D.
此溶液的渗透浓度为 7153 mmol·L -1
E.
NaCl的浓度约为0.14 mol·L -1
F.
NaCl的浓度约为0.070 mol·L -1
【简答题】氧原子上的酰化其产物是 ,氮原子上的酰化其产物是 ,碳原子上的酰化其产物是 。
【单选题】今有一氯化钠溶液,测得凝固点为-0.26 °C,下列说法正确的是(K f =1.86 K·kg·mol -1 )( )
A.
溶液的渗透浓度为140 mmol·L -1
B.
溶液的渗透浓度为280 mmol·L -1
C.
溶液的渗透浓度为70 mmol·L -1
D.
溶液的渗透浓度为153 mmol·L -1
【单选题】下列哪种情况适合建立索引?( )
A.
在查询中很少被引用的列
B.
在ORDER BY子句中使用的列
C.
包含太多重复选用值的列
D.
数据类型为bit、text、image等的列
【单选题】今有一氯化钠溶液,测得凝固点为 -0.26 ̊C ,若将红细胞置于该溶液中会出现什么现象?(纯水的凝固点为 0.000 ̊C, K f = 1.86 K• kg•mol -1 ) ( )
A.
溶血
B.
正常
C.
皱缩
D.
无法判断
【单选题】下列哪一项不是中国传统文化的重要特点
A.
重视集体利益，强调整体至上。
B.
重视个体道德修养，追求理想人格。
C.
强调以严刑峻法治理国家。
D.
儒家思想长期占据主导地位。
【简答题】氧原子上的酰化其产物是 ,氮原子上的酰化其产物是 , 碳原子上的酰化产物是 ______。
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