某小区20户家庭的日用电量(单位:千瓦时)统计如下:日用电量(单位:千瓦时)45

题型:选择题

问题:

某小区20户家庭的日用电量(单位:千瓦时)统计如下:
日用电量(单位:千瓦时) 
4       
5         
6        
7       
8          
10         
户数                      
1        
3          
6           
5           
4         
1          
这20户家庭日用电量的众数、中位数分别是
(A) 6,6.5     (B) 6,7     (C)6,7.5     (D)7,7.5
考点:全面调查和抽样调查频数与频率直方图扇形图
题型:选择题

阅读理解。

     What is your favourite colour? Do you like yellow, orange or red? If you do, you must be optimist (乐观

者), a leader or an active person who enjoys life. Do you prefer grey and blue?

     Then you are probably quiet, shy and you'd rather follow than lead. You seem to be a pessimist (悲观者).

     Colours influence our moods, there is no doubt about it. A yellow room makes most people feel more

cheerful and warmer than a dark green one. It seems that a red dress brings warmth and cheer. On the other

hand, black is depressing (令人压抑的). A black bridge over the River Thames, near London, used to be the

scene of more suicides (自杀) than other bridges in the area until it was painted green. The number of suicide

attempts (企图) fell sharply at once, perhaps it would have fallen even more if the bridge had been done in pink

or baby blue. Light and bright colours make people not only happier but also more active. It is true fact that

factory workers work better, harder and have fewer accidents when their machines are painted orange rather

than black or dark green.

1. If you are an optimist, you like the colours except _____.

A. yellow

B. orange

C. grey

D. red

2. If you prefer grey and blue, then you are probably except _____.

A. quiet

B. shy

C. a pessimist (悲观者)

D. an optimist (乐观者)

3. _____ room makes most people feel more cheerful and warmer than a dark green one.

A. A yellow

B. A red

C. A blue

D. A white

4. _____ is depressing. (令人压抑的).

A. Red

B. Black

C. Blue

D. Green

5. When the factory's machines are painted orange, the workers will _____.

A. have more accidents

B. work better and harder

C. work less time

D. be depressed

题型:选择题
在10以内的所有质数中,加上2以后还是质数的有(  )个.
A.2B.3C.4
题型:选择题

若实际利率为7%,同期通货膨胀率为9%,则名义利率应为( )。

A.16%

B.7%

C.2%

D.-2%

题型:选择题

以下不属于BIM算量软件的特征的是()。

A、基于三维模型进行工程量计算

B、支持二次开发

C、支持按计算规则自动算量

D、支持三维数据交换标准

题型:选择题

企业所设置的“专职安全管理人员”是指()负责安全生产管理工作的人员。

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