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问题 选择题

细胞分裂以后，新细胞中的遗传物质

A．和母细胞一样多

B．比母细胞多一倍

C．比母细胞少一半

D．和母细胞差不多

答案

答案：A

题目分析：细胞分裂中最重要的变化是细胞核中染色体的变化，在细胞分裂的过程中，染色体复制加倍，随着分裂的进行，染色体分成完全相同的两份，分别进入两个新细胞中．这种变化的重要意义在于：细胞核中有遗传物质DNA，而DNA就是染色体的成分之一，细胞分裂实现了染色体的复制和均分，也就实现了遗传物质DNA的复制和均分．因此保证了通过细胞分裂产生的新细胞与原细胞所含的遗传物质相同．

听力题

根据短文内容及首字母提示,填写所缺单词

In the 1930s, Dan West was farming in Spain.  It was wartime, and people were starving (挨饿). An i小题1: hit him

as he handed out cups of milk to children. “These children don’t need a cup.  They need a cow.” This was the b  小题2: of Heifer International. Heifer International gives different k 小题3:  of gifts.  Its gifts might

say “quack” or “moo”.  Dan West asked friends in the United States to give gifts of heifers(小母牛), or young cows.  S小题4: then, Heifer International has given animals to four million families.  It gives people the chance to f  小题5:   themselves.

Heifers International wants the people they help to help others.  For one project, the group s 小题6:  chickens to some children in Asia.  The children yearned for(向往) the day when they could help others.  Nine-year-old Julie knew she had to look after her chickens w 小题7:  so they would produce new eggs and healthy chicks.  She t 小题8:  good care of them, and they gave birth to strong, healthy chicks.  Julie then passed on the gift of chicks to other families.

Because of Heifer International, children can s 小题9:  their days in a schoolhouse instead of working in the fields.  They can use the money they earn from their animals to pay for school.  Heifer International has made a huge d 小题10:  to people’s lives for many years.  People should be grateful to a kindhearted farmer named Dan West.
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单项选择题

采用回收现金流法计算违约损失率时，若回收金额为1.04亿元，回收成本为0.84亿元，违约风险暴露为1.2亿元，则违约损失率为( )。

A．13.33%

B．16.67%

C．30.00%

D．83.33%
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