导线接头连接不紧密,会造成接头()。A、绝缘不够B、发热C、不导电

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问题:

导线接头连接不紧密,会造成接头()。

A、绝缘不够

B、发热

C、不导电

考点:电工特种作业操作证电工复审电工复审题库
题型:单项选择题

In the United States, every year, Thanks-giving Day is on the fourth Thursday in November. Because Canada is on the north of the United States, and is colder, the harvest comes earlier(更早) in the year. In Canada, people have Thanksgiving Day on the second Monday in October.

The harvest brings a lot of food to the people. On Thanksgiving Day people in Canada and America like to have a big meal with their friends and family just like Chinese people do at Mid-autumn festival. Many Canadians and Americans put flowers, vegetables and fruits around their homes to say “Thank you” for the harvest. At a Thanksgiving Day dinner, many Canadians and Americans will eat turkey, potatoes, and pumpkin pie. These are food like the food of many years ago. They are saying “Thank you” for the harvest that comes every year.

小题1:____________ celebrates the Thanksgiving Day like the U.S.A. .

A. China      B. Canada     C. Korea    D. Japan

小题2:In Canada, Thanksgiving Day is  __________________.

A.on the fourth Thursday in November

B.on the second Monday in October

C.on the second Thursday in November

D.on the fourth Monday in October小题3:At a Thanksgiving Day dinner, many Canadians and Americans will eat_____________.

A.chicken, potatoes, and pumpkin pie.

B.turkey, tomatoes, and pumpkin pie.

C.turkey, potatoes, and apple pie.

D.turkey, potatoes, and pumpkin pie.小题4:Why people celebrate the Thanksgiving Day?

A.Because people want to have a big meal.

B.Because people want to eat turkey, potatoes and pumping pie.

C.Because people want to get together with their friends and family.

D.Because people want to say “Thank you” for the harvest.小题5:Which of the following is TRUE?

A.Canada has Thanksgiving earlier in the year because the harvest comes earlier.

B.The harvest doesn’t bring a lot of food to the people.

C.Canada is on the south of the United States.

D.People are saying “Hello” for the harvest on Thanks-giving Day.

题型:单项选择题

正常人血清中含量最少的抗体是()。

 

A.IgG

B.IgM

C.IgD

D.IgE

E.IgA

题型:单项选择题

在四冲程汽油机的一个工作循环中,做功冲程是______能转化为______能.

题型:单项选择题

溶剂蒸汽在蒸发设备内的长时间停留会对蒸发速率产生影响。

题型:单项选择题

实现主减速器主动圆锥齿轮的轴向移动的方法有()

A.通过增减主动锥齿轮轴承座与主减速器壳之间的调整垫片厚度

B.通过增减主动锥齿轮背面与轴承之间的调整垫片厚度

C.通过增减主动锥齿轮轴肩前面调整垫片厚度

D.用调整螺栓配合调整垫片

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