在大型、复杂的成套设备工程建设中,需要完成大量的工作或活动,其进度计划显得非常庞大和

题型:单项选择题

问题:

在大型、复杂的成套设备工程建设中,需要完成大量的工作或活动,其进度计划显得非常庞大和繁杂,为满足不同级别和类型的用户需要,可将其编制成( )。

A.详细进度计划

B.多级进度计划

C.阶段性进度计划

D.体系进度计划

考点:设备监理师质量、投资、进度控制进度控制、投资、质量综合
题型:单项选择题

下列事件中是必然事件的是(           )

A.平移后的图形与原来图形对应线段相等。

B.在一个等式两边同时除以同一个数,结果仍是等式。

C.一个不透明的袋子中有6个红球1个黑球,每次摸出1个球然后放回搅匀,摸7次时一定会摸出一个黑球。

D.任意一个五边形外角和等于540°

题型:单项选择题

Error correction. ( 15 points )

One day, Mary stopped outside the shoe-shop and looked into the 小题1:_______

window. For some times, she fixed her eyes on a pair of high boots 小题2:_______

on display. “They are exactly I’ve been looking for,” she thought,  小题3:_______

“I would like to buy a pair of boots as that in the window.”    小题4:_______

After ask about the price, Mary decided to try a pair on. While    小题5:_______

the shop-assistant was helping him  put the boots on, she kept     小题6:_______

looking at Mary’s stockings which was made of fine white lace (网眼).小题7:____

“Excuse me for asking,” the assistant said at last, “but where    小题8: _______

did you get these stockings? They are the most latest fashion”.    小题9:_______

“They were given to me by my grandma!” Mary said proud. 小题10:________

题型:单项选择题

交流发电机在工作时的电动势e=Emsinωt.若将线圈匝数、线圈面积都提高到原来的两倍,其他条件不变,则电动势变为(  )

A.e=2Emsinωt

B.e=4Emsinωt

C.e=12Emsinωt

D.e=14Emsinωt

题型:单项选择题

已知:A、B两种证券构成证券投资组合。A证券的预期收益率10%,方差是0.0144,投资比重为80%;B证券的预期收益率为18%,方差是0.04,投资比重为20%;A证券收益率与B证券收益率的协方差是0.0048。

要求:

(1)计算下列指标:

①该证券投资组合的预期收益率;

②A证券的标准差;

③B证券的标准差;

④A证券与B证券的相关系数;

⑤该证券投资组合的标准差。

(2)当A证券与B证券的相关系数为0.5时,投资组合的标准差为12.11%,结合(1)的计算结果回答以下问题:

①相关系数的大小对投资组合预期收益率有没有影响

②相关系数的大小对投资组合风险有什么样的影响

题型:单项选择题

Cold weather can be hard on pets, just like it can be hard on people. Sometimes owners forget that their cats are just as used to the warm shelter (住所) as they are. Some owners will leave their animals outside for a long period of time, thinking that all animals are used to living outdoors. This can put their pets in danger of serious illness. There are things you can do to keep your animal warm and safe.

Keep your pets inside as much as you can when the weather is bad. If you have to take them out, stay outside with them. When you’re cold enough to go inside, they probably are too. If you must leave them outside for a long time, make sure they have a warm, solid shelter against the wind, thick bedding, and plenty of non-frozen water.

If left alone outside, dogs and cats can be very smart in their search for warm shelter. They can dig into snow banks or hide somewhere. Watch them closely when they are left outdoors, and provide them with shelter of good quality. Keep an eye on your pet’s water. Sometimes owners don’t realize that a water bowl has frozen and their pet can’t get anything to drink. Animals that don’t have clean and unfrozen water may drink dirty water outside, which may contain something unhealthy for them.

小题1:What do we learn about pets from Paragraph 1?

A.They are often forgotten by their owners.

B.They are used to living outdoors.

C.They build their own shelter.

D.They like to stay in warm places.小题2:Why are pet owners asked to stay with their pets when they are out in cold weather?

A.To know when to bring them inside.

B.To keep them from eating bad food.

C.To help them find shelters.

D.To keep them company.小题3:If pets are left on their own outdoors in cold weather, they may ___.

A.run short of clean water

B.dig deep holes for fun

C.dirty the snow nearby

D.get lost in the wild小题4:What is the purpose of this text?

A.To solve a problem.

B.To give practical advice.

C.To tell an interesting story.

D.To present a research result.

更多题库