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问题 问答题 简答题

出生缺陷的发生一般与哪些因素有关？

答案

参考答案：

出生缺陷是由于遗传因素、环境因素或两者的相互作用而发生的。环境因素包括物理因素、生物因素、化学物质及营养因素等。

填空题

请据消化系统模式图，分析回答下列问题：

（1）可以初步消化蛋白质的器官是______它分泌的消化液是______．

（2）人体最大的消化腺是______它分泌的______不含消化酶．

（3）消化和吸收的主要场所是______．

（4）小肠中含有______种消化液，其中有由______分泌的胰液．

（5）淀粉主要在______和______中被消化；

（6）食物消化经过的消化道顺序是：______、咽、食道、胃、小肠、大肠和肛门．
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单项选择题

The swan is mostly silent through its life, unable to sing sweet songs like most other birds. In ancient times, however, people believed a swan sings a most beautiful song just before it dies. The ancient Greek philosopher Socrates talked of this 2,300 years ago. Socrates explained that the swan was singing because it was happy. The bird was happy because it was going to, serve the Greek God Apollo. Swans were holy to Apollo, the god of poetry and song.
The story of the swan’s last song found a place in the works of other writers, including the early English writers Chaucer and Shakespeare. And the expression swan song has long been a part of the English language. At first, "swan song" meant the last work of a poet, musician or writer. Now, it means the final effort of any person. Someone’s swan song usually is also considered that person’s finest work.
A political expression with a similar meaning is "the last hurrah". The expression may be used to describe a politician’s last campaign, his final attempt to win cheers and votes. The last hurrah also can mean the last acts of a politician, before his term in office ends. Writer Edwin O’Connor made the expression popular in 1956. He wrote a book about the final years in the political life of a long-time mayor of Boston. He called his book The Last Hurrah.
Some language experts say the expression came from a name given to noisy supporters of Andrew Jackson, America’s seventh president. They cheered hurrah so loudly for Andy Jackson during his presidential campaign that they became known as the hurrah boys.
Jackson’s hurrah boys also played a part in the election to choose the next president. Jackson’s choice was his vice president, Martin VanBuren. A newspaper of the time reported that VanBuren was elected president: "... by the hurrah boys, and those who knew just enough to shout hurrah for Jackson. " President Jackson really heard his last hurrahs in the campaign of the man who would replace him in the White House.

The English expression "swan song" ______.

A. was first used by Chaucer
B. changed its meaning through time
C. means the best song ever created
D. refers to a work of Shakespeare
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