电气线路发生火灾的原因最可能是()。A.导线接触不良 B.线路短路保护未动作 C.电

题型:单项选择题

问题:

电气线路发生火灾的原因最可能是()。

A.导线接触不良

B.线路短路保护未动作

C.电气误操作

D.线路发生倒杆事故

考点:宏观经济政策电气电气题库
题型:单项选择题

Americans like to travel all their yearly holiday. Today,more and more travelers in the United States are spending nights at small houses or inns instead of hotels. They get a room for the night and the breakfast the next morning.

Rooms for the night in private homes with breakfast have been popular with travelers in Europe for many years. In the past five to ten years,these bed­breakfast places have become popular in the United States.Many of these America's bed­and­breakfast inns are old historic buildings.Some bed­breakfast inns have only a few rooms;others are much larger.Some inns do not provide telephones or televisions in the rooms;others do.

Staving at a bed­and­breakfast inn is much different from staying at a hotel.Usually the cost is much less.Staying at an inn is almost like visiting someone's home.The owners are glad to tell about the areas and the interesting places to visit.Many vacationers say that they enjoy the chance to meet local families.

小题1:Americans like to take a holiday trip ________.

A.all the year round

B.for years

C.every year

D.every other year小题2:According to the passage,which of the following is NOT true?

A.Some Americans like to stay at bed­and­breakfast homes instead of at hotels.

B.The bed­and­breakfast inns are private homes opened to vacationers.

C.The bed­and­breakfast inns have been popular in America for a long time.

D.The bed­and­breakfast inn owners provide a morning meal for their visitors and a room for the night.小题3:Why do American travelers prefer staying at bed­and­breakfast inns?

A.It is like visiting someone's home.

B.The money they spend there is much less.

C.They can meet local families.

D.All of the above.小题4:Staying at the bed­and­breakfast inns,________.

A.the travelers needn't pay anything

B.the travelers don't have to pay for the telephone or television

C.the travelers can meet and talk with the local people

D.the owners will show the travelers around the area

题型:单项选择题

一船以相对河水不变的速度渡河,船头始终与河岸垂直。若突然河水流速增大,则渡河时间将(设该河各处河宽均相等)······(     )

A.时间增加

B.时间缩短

C.时间不变

D.无法判断

题型:单项选择题

青少年每日摄入的蛋白质应有一半为优质蛋白质。

题型:单项选择题

配制溶质质量分数为10%的稀盐酸溶液500g,需质量分数为38%(密度为1.19g/cm3)的盐酸(  )

A.131.6mL

B.110.6mL

C.120mL

D.100.8mL

题型:单项选择题

对于男同志来说,每天食用下列哪种食物可以使患前列腺癌的几率降低45%以上()

A.鸡蛋

B.西红柿

C.葡萄

D.红枣

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