搜题请搜索小程序“爱下问搜题”
问题 问答题 简答题

北方豌豆春播为什么顶凌播种？

答案

参考答案：

豌豆耐寒不耐热，温度过高生长不良，嫩荚产量减少，品质下降。北方地区多春播夏收，早春顶凌播种。早播使豌豆出苗后仍处于较低温度下，主茎生长缓慢，基部节间也变得短而紧凑，有利于形成良好的株形和群体结构，春化作用也充分，有利于花蕾的分化和发育。同时也可保证植株在高温季节来临之前完成生长发育。

解答题
一套衣服的价格为540元，其中裤子的价格是衣服的
4
5
，上衣、裤子各多少元？
查看答案
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.

In ancient times, people believed that a swan sings most beautifully ______.

A. before death
B. when it is happy
C. for Apollo
D. in front of other birds
查看答案