当最高气温高于250C时,混凝土应在()以内开始自然养护。 A.3h B.4h C.

题型:单项选择题

问题:

当最高气温高于250C时,混凝土应在()以内开始自然养护。

A.3h

B.4h

C.5h

D.6h

考点:施工员设备安装工程设备安装工程题库
题型:单项选择题

古诗文默写。

小题1:            ,却话巴山夜雨时。(《夜雨寄北》李商隐)

小题2:采菊东篱下,             。(《饮酒(其五)》陶渊明)

小题3:历史上英雄成名也需要机遇,比如火烧赤壁、大败曹军的周瑜,于是杜牧在《赤壁》里面这样感慨:“                         。”

小题4:刘禹锡的诗历来表现一种豪迈乐观的心态,如他在《秋词》里这样写道:“                                。” 这句诗就是作者高远爽朗心情的反映。

小题5:古人用语极为精练,如郦道元在《三峡》一文中仅用“         ,            ”八个字就把各具特色的四种景物概括全面了,而且由景境导出了作者的心境。

题型:单项选择题

在Visual FoxPro中,在数据库中创建表的CREATE TABLE命令中定义主索引、实现实体完整性规则的短语是( )。

A.FOREIGN KEY

B.DEFAULT

C.PRIMARYKEY

D.CHECK

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The head of the Library of Congress is to name Donald Hall, a writer whose deceptively simple language builds on images of the New England landscape, as the nation’s 14th poet laureate today.
Mr. Hall, a poet in the distinctive American tradition of Robert Frost, has also been a harsh critic of the religious right’s influence on government arts policy. And as a member of the advisory council of the National Endowment for the Arts during the administration of George H. W. Bush, he referred to those he thought were interfering with arts grants as "bullies and art bashers".
He will succeed Ted Kooser, the Nebraskan who has been the poet laureate since 2004.
The announcement of Mr. Hall’s appointment is to be made by James H. Billington, the Librarian of Congress. Mr. Billington said that he chose Mr. Hall because of "the sustained quality of his poetry, the reach and the variety of things he talks about." Like Mr. Kooser, Mr. Billington said, Mr. Hall "evokes a sense of place."
Mr. Hall, 77, lives in a white clapboard farmhouse in Wilmot, N. H. , that has been in his family for generations. He said in a telephone interview that he didn’t see the poet laureateship as a bully pulpit. "But it’s a pulpit anyway," he said. "If I see First Amendment violations, I will speak up."
Mr. Hall is an extremely productive writer who has published about 18 books of poetry, 20 books of prose and 12 children’s books. He has won many awards, including a national Book Critics Circle Award in 1989 for "The One Day," a collection.
In recent years much of his poetry has been preoccupied with the death of his wife, the poet Jane Kenyon, in 1995.
Robert Pinsky, who was poet laureate from 1997 to 2000 said he welcomed Mr. Hall’s appointment, especially in light of his previous outspokenness about politics and arts. "There is something nicely symbolic, and maybe surprising," Mr. Pinsky said, "that they have selected someone who has taken a stand for freedom."
The position carries an award of $35,000 and $5,000 travel allowance. It usually lasts a year, though poets are sometimes reappointed.

James H. Billington ______ .

A.likes the poems with great depth and width

B.speaks highly of poems in simple English rather than complex ones

C.prefers the poems with sustained style and expression

D.likes the poems with the knowledge of various things

题型:单项选择题

沸腾是指发生在()剧烈气化的现象。

A.液体内部

B.液体表面

C.液体内和表面同时

题型:单项选择题

农业承包合同所规定的权利和义务相互联系,互为条件,往往()。

A、一方的权利是另一方的权利

B、一方的义务也是另一方的义务

C、一方的权利构成另一方的义务

D、一方的义务构成另一方的权利

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