下列说法正确的是 [ ] A.摩尔是一种国际基本物理量 B.标准状况下气体摩尔体积

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问题:

下列说法正确的是

[ ]

A.摩尔是一种国际基本物理量

B.标准状况下气体摩尔体积为22.4L

C.1mol氧的质量为16g

D.在同温同压下,相同体积的任何气体所含分子数相同

考点:气体摩尔体积化学单位(摩尔)阿伏加德罗定律
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为防止药品被污染和混淆,生产操作应采取的措施是

A.生产前应确认无上次生产遗留物

B.应防止尘埃的产生和扩散

C.不同药性的药材不得在一起洗涤

D.制定质量管理和检验人员职责

E.直接入药的药材粉末,配料前应做微生物检查

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所有挂账都必须开具《()》,由客人签名确认。

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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.

Donald Hall ______ .

A.uses simple English to express the images of the New England landscape

B.dislikes the idea of impacting government by the right side of the religion

C.is the 14th poet laureate appointed by the Congress

D.is a member of the advisory council of the National Endowment for the Arts

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感染性的骨性死腔内有大块死骨及炎性肉芽组织,经久不愈

A.急性骨髓炎
B.慢性骨髓炎
C.创伤后骨髓炎
D.硬化性骨髓炎
E.局限性骨脓肿

题型:选择题

图示机构在M和作用下处于平衡。若给AC杆C点以虚位移,则可知B点虚位移大小为()。

A.A

B.B

C.C

D.D

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