下列()的信号是脉宽调制信号。 A.节气门位置传感器 B.碳罐电磁阀 C.水温传感器

题型:单项选择题

问题:

下列()的信号是脉宽调制信号。

A.节气门位置传感器

B.碳罐电磁阀

C.水温传感器

考点:汽车专业汽车检测与维修汽车检测与维修题库
题型:单项选择题

Once a small boy lived on a farm which seemed so far away from everywhere.

He needed to get up before sunrise every morning to help his father on the farm. During sunrise he would .a break and climb up on the fence(篱笆)along the side of the farm. He could see a house with golden windows. “If they could afford golden windows, then there must be other nice things inside the house.” He imagined how great it would be to live there. Then he promised himself, “Some day 1 will go there and see this wonderful place.”

One morning, his father would go to the town and told him to stay at home for a rest. Knowing that this was his chance, he took a sandwich and headed across the field towards the house with the golden windows.

As the afternoon went on, he began to know how wrong he was. The house was much farther than he had expected. As he went near the house, he saw no golden windows but instead a place in bad need of a painting. A small girl very close to his age came out of the poor house and stood by the broken fence. He asked her if she had seen the house with the golden windows. The girl said, “Sure, I know.” and invited him to sit on the porch (门廊).As he sat there, he looked back from where he just came. There he saw the sunset turned the windows of his house to gold! Now he understood that everyone had his own house with golden windows.

小题1:During his break every morning, the small boy would _________.

A.fix the fence

B.eat sandwiches

C.climb up on the fence

D.walk around the farm小题2:One morning, when knowing he would stay alone, the boy thought it was a chance for him to_________.

A.go to the town

B.play on the field

C.go to see the house

D.make the golden windows小题3:What did the boy find when he got there?

A.Nobody lived in the poor house.

B.No golden windows were in the house.

C.The house was so old as he expected.

D.The house was nearer than he thought.小题4:The story tells us that people sometimes may have the thought________ .

A.Like father, like son

B.Love me, love my dog

C.Every dog has its day

D.The grass is greener somewhere else

题型:单项选择题

男孩,4岁。因“咳喘2天,气喘加剧半天”就诊。查体:体温正常,吸气性呼吸困难,口唇微绀,听诊两肺广泛哮鸣音,心率140次/分,既往有哮喘发作史5次,有过敏史,其母亦有哮喘史。

应立即采取哪项措施()

A.吸氧

B.X线检查

C.肺功能检查

D.痰培养

E.抗感染

F.脱敏疗法

G.补液纠正酸中毒

题型:单项选择题

某男,60岁,有左室前壁心肌梗死病史,超声复查发现左心室心尖部有一边界明确回声团块紧贴于室壁上,其最可能诊断为

A.心室血栓
B.心室黏液瘤
C.栓子移行至左心室
D.感染性心内膜炎
E.寄生虫疾病

题型:单项选择题

阅读苏轼《水调歌头》的上片,回答下列小题:
明月几时有把酒问青天。不知天上宫,今夕是何年我欲乘风归去,又恐楼玉宇,高处不胜寒。起舞弄清影,何似在人间。

给词中加点的字注音。
阙:______ 琼:______

题型:单项选择题

长期在7C分贝以上噪声环境中,可造成人的心理性改变的有:()。

A.精神不集中

B.心烦意乱

C.心律变慢

D.血压不稳

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