对于短路电流相当大或有易燃气体的地方应采用()系列熔断器。 A.有填料封闭管式RT

题型:单项选择题

问题:

对于短路电流相当大或有易燃气体的地方应采用()系列熔断器。

A.有填料封闭管式RT

B.无填料封闭管式RM

C.螺旋式RL

D.瓷插式RC

考点:车辆电工考试中级车辆电工中级车辆电工题库
题型:单项选择题

一辆卡车驾驶室内的灯泡,由左右两道门上的开关Sl、S2和车内司机右上方的开关S3共同控制。S1和S2分别由左右两道门的开、关来控制:门打开后,S1和S2闭合,门关上后,Sl和S2断开。S3是一个单刀三掷开关,根据需要可将其置于三个不同位置。在一个电路中,要求在三个开关的共同控制下,分别具有如下三个功能:(1)无论门开还是关,灯都不亮;(2)打开两道门中的任意一道或两道都打开时,灯就亮,两道门都关上时,灯不亮;(3)无论门开还是关,灯都亮。图所示的四幅图中,符合上述要求的电路是(  )

题型:单项选择题

水烧开时,可以看到白色“气“,它实际上是(  )

A.沸腾产生的水蒸气

B.水蒸气遇冷凝结成的小水珠

C.热空气

D.水蒸气遇冷凝华而成的小冰晶

题型:单项选择题

胃肠燥结兼瘀血之阴吹,治疗宜用

A.当归贝母苦参丸 

B.大承气汤 

C.橘半桂苓枳姜汤 

D.膏发煎 

题型:单项选择题

The 1____ picked up the thermos and poured some hot water into the tea-cup and placed it on the small table in front of his 2____, who were a father and daughter, and put the lid on the cup with a clink. Obviously 3_____ of something, he hurried into the inner room, leaving the 4 _____ on the table. His two guests heard a box of drawers opening and a rustling(飒飒地响).
They 5 _____ sitting in the living-room, the 10-year-old daughter, looking at the flowers outside the window. The father was just about to take his cup when the 6 ____ came, right there in the living room. Something was hopelessly broken.
It was the thermos, which had fallen to the floor. The girl looked 7 ____ her shoulder at once, startled(吓一跳), 8_____. It was 9 _____.Neither of them had touched it, not even a little bit. The sound caused the host to rush back from the inner room. He looked at the 10_____ floor and blurted out(脱口而出), “It doesn’t matter, it doesn’t matter!”
The father started to say something. Then he muttered(嘀咕), “ Sorry, I 11_____ it and it fell.”
“It doesn’t matter,” the host said.
Later, when they left the house the daughter said, “Daddy, I saw your 12 ____ in the windowpane(玻璃窗). You were sitting perfectly13____. Why did you say…?”
The father 14____, “What then would you 15____ as the cause of its fall?”
“It fell by itself. The floor is uneven(不平). It wasn’t steady when Mr Li put it there.”
“It won’t 16_____, girl. It sounds more 17_____ when I say I knocked it down. There are things people accept less the more you 18_____them. The truer your story is, the less true it sounds.”
The daughter was 19_____ in silence for a while. Then she said, “Can you 20____ it only this way?”
“Only this way,” the father said.
小题1:
A.ownerB.hostC.guestD.master
小题2:
A.friendsB.neighborsC.childrenD.guests
小题3:
A.knowingB.rememberingC.hearingD.thinking
小题4:
A.thermosB.cupC.lidD.tea
小题5:
A.enjoyedB.remained C.imaginedD.hated
小题6:
A.strangerB.hostC.crashD.noise
小题7:
A.aroundB.atC.behindD.over
小题8:
A.staringB.watchingC.shoutingD.crying
小题9:
A.helpless B.exciting C.strangeD.terrible
小题10:
A.broken B.streamingC.dirtyD.flooded
小题11:
A.touchedB.used C.hitD.moved
小题12:
A.facedB.shadow C.reflectionD.action
小题13:
A.calm B.stillC.silentD.straight
小题14:
A.shoutedB.murmured C.laughedD.repeated
小题15:
A.tellB.makeC.acceptD.give
小题16:
A.do B.helpC.goD.fit
小题17:
A.comfortable B.friendlyC.acceptable D.agreeable
小题18:
A.defend B.supportC.discussD.argue
小题19:
A.kept B.shutC.worried D.lost
小题20:
A.doB.explainC.makeD.manage
题型:单项选择题

The kids are hanging out. I pass small bands of students, in my way to work these mornings. They have become a familiar part of the summer landscape.

These kids are not old enough for jobs. Nor are they rich enough for camp. They are school children without school. The calendar called the school year ran out on them a few weeks ago. Once supervised by teachers and principals, they now appear to be in "self care".

Passing them is like passing through a time zone. For much of history, after all, Americans arranged the school year around the needs of work and family. In 19th-century cities, schools were open seven or eight hours a day, 11 months a year. In rural America, the year was arranged around the growing season. Now, only 3 percent of families follow the agricultural model, but nearly all schools are scheduled as if our children went home early to milk the cows and took months off to work the crops. Now, three-quarters of the mothers of school-age children work, but the calendar is written as if they were home waiting for the school bus.

The six-hour day, the 180-day school year is regarded as something holy. But when parents work an eight-hour day and a 240-day year, it means something different. It means that many kids go home to empty houses. It means that, in the summer, they hang out.

"We have a huge mismatch between the school calendar and the realities of family life," says Dr. Ernest Boyer, head of the Carnegie Foundation for the Advancement of Teaching."

Dr. Boyer is one of many who believe that a radical revision of the school calendar is inevitable. "School, whether we like it or not, is educational. It always has been. "

His is not a popular idea. Schools are routinely burdened with the job of solving all our social problems. Can they be asked to meet the needs of our work and family lives

It may be easier to promote a longer school year on its educational merits and, indeed, the educational case is compelling. Despite the complaints and studies about our kids’ lack of learning, the United States still has a shorter school year than any industrial nation. In most of Europe, the school year is 220 days. In Japan, it is 240 days long. While classroom time alone doesn’t produce a well-educated child, learning takes time and more learning takes more time. The long summers of forgetting take a toll.

The opposition to a longer school year comes from families that want to and can provide other experiences for their children. It comes from teachers. It comes from tradition. And surely from kids. But the most important part of the conflict has been over the money.

Which of the following is an opinion of the author’s().

A. "The kids are hanging out. "

B. "They are school children without school. "

C. "These kids are not old enough for jobs. "

D. "The calendar called the school year ran out on them a few weeks ago. \

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