已知齐次线性方程有非零解，则常数λ可取为（） A.2，5，8 B.-2，-5，-8

发布时间：2017-08-19 04:42 │ 来源：www.tikuol.com

题型：单项选择题

问题：

已知齐次线性方程有非零解，则常数λ可取为（）

A.2，5，8

B.-2，-5，-8

C.-2，5，8

D.2，-5，-8

考点：岩土工程基础知识第一章高等数学第一章高等数学题库

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完形填空
A lady once wrote a long story. She sent it to a famous editor. After 1 weeks the editor 2 the story to her. The lady was 3 . She wrote back to the editor: "Dear Sir， Yesterday you sent back a story of mine. 4 do you know that the story is not good? You did not read it. 5 I sent you the story, I pasted(粘)together pages18,19 and 20. This was a 6 to see whether you would read the story. When the story came back yester-day，the pages were 7 pasted together. Is this the 8 you read all the stories that are sent to you?" The editor wrote back: "Dear Madam, When I have an egg 9 breakfast, I 10 eat the whole egg in order to discover that it is bad.
( )1. A. few ( )2. A. gave ( )3. A. angry ( )4. A. How ( )5. A. After ( )6. A. lesson ( )7. A. already ( )8. A. work ( )9. A. on ( )10. A. must not	B. a few B. came back B. happy B. Why B. Until B. test B. still B. check B. for B. have not to	C. little C. handed C. satisfied C. What C. before C. question C. even C. road C. at C. need not to	D. a little D. returned D. glad D. Where D. Since D. thing D. yet D. way D. in D. don’t have to

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A.珍贵、濒危的陆生野生动物

B.珍贵、濒危的水生野生动物

C.有益的或有重要经济、科学研究价值的陆生野生动物

D.有益的或有重要经济、科学研究价值的水生野生动物

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定置管理起源于（）

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某仓库有两名发货员，一名审核员。当顾客提货时，只要发货员空闲，允许顾客进入仓库提货，顾客离开时，审核员检验顾客提货是否正确。其工作流程如图13-15所示。为了利用PV操作正确地协调他们之间的工作，设置了两个信号量S1和S2，且S1的初值为 2，S2的初值为1。图中的a应填写 (54) ；图中的b、c和d应分别填写 (55) 。

（55）处填（）。

A.P(S2)、V（S2）和V（S1）

B.P（S1）、V（S1）和V（S2）

C.V（S1）、P(S2)和V(S2)

D.V（S2）、P（S1）和V（S1）

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下列各项中属于中国古代戏曲艺术特征的是（）。

A.写实性

B.群众性

C.写意性

D.理论性

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