下列四组多边形中,能密铺地面的是( ) ①正六边形与正三角形;②正十二边形与正三

题型:选择题

问题:

下列四组多边形中,能密铺地面的是(   )

①正六边形与正三角形;②正十二边形与正三角形;③正八边形与正方形;④正三角形与正方形。

A.①②③

B.①③④

C.① ④

D.①②③④

考点:相似多边形的性质相似三角形的判定相似三角形的性质相似三角形的应用
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绩效薪资的最大特点在于,它是由()决定的。

A.工作时间或工作资历

B.工作绩效或组织奖励

C.组织奖励或个人需求

D.个人或群体或组织的绩效水平

题型:选择题

下列说法正确的是

A.除去乙烷中的乙烯:在光照条件下通入Cl2,气液分离

B.除去乙醇中的乙酸:加足量生石灰后蒸馏

C.“硝基苯制备”实验中,浓硫酸起氧化作用

D.用溴水不能验证裂化汽油中含有不饱和烃

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(E)

Free and secure accommodation, no bills and even the odd home-cooked meal. It sounds like the perfect living arrangement for cash-strapped students.

Two mothers believe they have devised a way for struggling students to save on accommodation costs when they leave home to study at university.

Kate Barnham and Amanda Flude have launched Student Swaps, an online accommodation forum (论坛) for parents and students, in advance of the introduction in September of £3,000 higher education top-up fees.

Their website says, “The principle behind Student Swaps is to enable students to literally swap (交换) family homes.” The website will hold a database of students who would like to swap and link them with suitable matches. So those from one town / city could swap with those from a different town / city.

The site describes itself as offering a “cost-free accommodation alternative… at a time of growing student debt”. There is no charge for the service at the moment but Ms Barnham and Ms Flude intend to introduce a £10 annual fee if it becomes established.

However, the National Union of Students (NUS) has warned that, while the scheme may sound appealing to struggling freshers, it lacks any formal regulation.

Veronica King, NUS vice-president of welfare, said, “The fact that this scheme has even been suggested is evidence to the high levels of debt students now face on graduation.” Recent research has shown that students are more likely to live at home in coming years, in a bid to cut down on the cost of a degree.

“This is worrying, as it may mean that students choose their university on the basis of where it is, rather than because it offers the best course for them. It also means students will miss out on what is for some a key part of the student experience-living away from home.”

71. A “cash-strapped” student means one who __________.

A. lacks money                        B. prefers to stay at home

C. is careful with money             D. wants to change cash

72. What is Kate Barnham and Amanda Flude’s purpose of launching Student Swaps?

A. To provide cheaper accommodation for students.          

B. To let students stay close to their universities.

C. To help students spend less on accommodation costs. 

D.To let students exchange ideas freely online.

73. What can students do on Student Swaps?

A. They can find students to exchange homes with.

B. They can make friends with students from a different city.

C. They can borrow money to pay for their higher education.

D. They can voice their opinions against the rising cost of a degree.

74. Now many students would prefer a university _________.

A. which can give them free accommodation            

B. which is not far away from their homes

C. which offers the best courses                                     

D. which can offer home-cooked meals

75. What would be the best title for the passage?

A. High Cost Troubles University Students in UK.

B. Students Swaps is Welcomed by Students in UK.

C. Two Mothers’ Good Intention to Help Students in UK.

D. Website Helps Students Live at Someone Else’s Home.

题型:选择题

在2号工作区打开数据表xs. dbf,并设置别名为student,应输入的命令是:
USE xs. dbf IN 2 【9】 student

题型:选择题

煤炭开采、自行车、钟表等行业正处于行业生命周期的( )。

A.幼稚期
B.成长期
C.成熟期
D.衰退期

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