( )不是促成冷裂纹的主要因素。A.钢种淬硬倾向大,产生淬硬组织 B.接头受到的拘

题型:单项选择题

问题:

( )不是促成冷裂纹的主要因素。

A.钢种淬硬倾向大,产生淬硬组织

B.接头受到的拘束应力大

C.较多扩散氢的存在和浓集

D.较多氧的存在和聚集

考点:电焊工中级电焊工中级
题型:单项选择题

满足条件{1,2}∪A={1,2,3}的所有集合A的个数是 ______个.

题型:单项选择题

根据短文内容,从短文后的选项中选出能填入空白处的最佳选项.选项中有两项为多余选项.

 51 It is considered a healthy practice if both the parents show equal participation in designing the baby’s room. This helps to create a special bond between the baby and the parents even before the baby is born.   52  Which one will suit your baby’s and your requirements should be determined so that designing the layout(布局) becomes easier.

  53 Pink baby room ideas for girls are the most suitable ones. Installing pink colored furniture, curtains and toys will make one of the best girl baby room ideas.   54  Yellow and orange or pink and brown baby room ideas prove to be neutral and can be opted(选择) for, if the gender of the baby is not known or if you are expecting twins. Another great alternative can be to paint cartoon pictures or a theme onto the walls to implement(实现) cute baby room wall ideas. If you are planning to set a theme for your baby’s room, then baby room mural ideas will provide you with the dramatic touch you want to add to the room.

  55  Picking up a theme from a fairytale, story books, nursery rhymes, cartoon series, etc. can prove to be educational as well as creative baby room ideas. Painting the walls according to the theme with every incident sketched on each wall is a creative baby room mural idea. If you want your baby to wake up to the beauty of nature, jungle baby room ideas will suit your needs. Painting the walls with trees and animals or installing a wall paper with eye-catching scenery can have a great effect on the baby. Celebrity baby room ideas are desirable for those crazy about Hollywood. Stars’ room or design the room with photos and belongings of the actor.

A.There are a lot of baby room ideas.

B.A baby’s room should have bright colors.

C.Boy’s baby room ideas can have a sports theme.

D.If ou are expecting twins, go for twin baby room ideas.E. Setting a baby room theme is a good idea for baby rooms.

F. Baby room ideas for boys will include everything set in blue.

G. The baby’s room should have a pleasant and happy environment.

题型:单项选择题

如下图所示的装置,C、D、E、F、X、Y都是惰性电极。将电源接通后,向(乙)中滴入酚酞溶液,在F极附近显红色。以下说法正确的是

[ ]

A.电源B极是正极

B.(甲)、(乙)装置的C、D、E、F电极均有单质生成,其物质的量之比为1∶2∶2∶1

C.欲用(丙)装置给铜镀银,H应该是Ag,电镀液是AgNO3溶液

D.装置(丁)中Y极附近红褐色变深,说明氢氧化铁胶粒带正电荷

题型:单项选择题

—"My father has bought a new car."

—"_____?"

—"It's blue and beautiful." [ ]

A. What do you like?

B. What's it like?

C. How is it like?

D. How do you think of it?

题型:单项选择题

下列( )等工作时间包含在定额中或在定额中给予了合理的考虑。

A.休息时间

B.多余工作时间

C.不可避免中断时间

D.非施工本身造成的停工时间

E.偶然工作时间

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