进程并发执行时可能会产生与时间有关的错误。形成这种错误是由于若干进程()A、交替地访

题型:单项选择题

问题:

进程并发执行时可能会产生与时间有关的错误。形成这种错误是由于若干进程()

A、交替地访问了共享变量

B、改变了各自的执行顺序

C、占用处理器的时间太长

D、执行了相同的程序

考点:02323操作系统概论02323操作系统概论题库
题型:单项选择题

以下各项哪一项是治疗痹症的主要治疗大法()

A.活血化瘀

B.益气养血

C.祛邪通络

D.健脾化湿

E.补益肝肾

题型:单项选择题

患者女性,60岁,5年前患乳腺癌手术治疗,术后化疗半年余。半年前发现在左锁骨上淋巴结肿大,无压痛,逐渐增多增大。2个月来出现胸憋、气短而就诊,化验检查:Hb109g/L,WBC6×109/L,血沉40mm/第1小时末,X线胸片示右肺肿块阴影,心影向两侧扩大,心脏搏动减弱。

检查证实该患者心包呈中等量积液,该患者心脏积液最可能的病因是()。

A.病毒感染

B.心肌梗死后综合征

C.肿瘤

D.心脏损伤

E.结核病

题型:单项选择题

When I was twelve years old, my family were the first black people to move into an all white part of Grand Rapids, Michigan. Many of our new neighbors weren’t very welcoming. Some of them said angrily that we should return to where we came from. The children sometimes threw stones at me .

Most of my teachers simply took no notice of me, but not Dorothy Bean, my history teacher. Miss Bean was angry at how badly I was being treated, but she didn’t say this to me. Miss Bean showed her respect for me by teaching me just like anyone else. Instead of being unnoticed, I was given a chance to show that I was clever. Miss Bean was the first teacher who ever made me think for myself. She always wanted to know what I thought about different questions. She expected me to have my own idea. Miss Bean was teaching me that thinking for oneself was the real key to education.

One day, when I was not paying attention in class, Miss Bean suddenly threw an eraser(黑板擦) at me. The eraser hit me right on the hand and sent my pencil flying. The whole class were very surprised at first, then started laughing. This event became famous in the school and, because it happened to me, the students wanted to get to know me. So that’s the story of how Dorothy Bean made me her target(靶子). However, what I want to do is express my thanks to her.

56. The author and his family were not welcomed by the local people because ____________.

A. they returned from another country     B. they have different skin color

C. they spoke a different language         D. they moved to a wrong place

57. From the end of the first paragraph we know that _____________.

A. children were more friendly to strangers

B. American schools were not safe for kids

C. children often follow their parents’ behavior

D. fighting each other is part of children’s nature

58. Miss Bean respected the author by ____________.

A. giving him special attention.

B. hitting him with an eraser.

C. giving him extra lessons.

D. treating him as one of her students.

59. To Miss Bean the most important thing for a student is to _________.

A. pay close attention to what the teacher says.

B. learn to think and have one’s own idea.

C. keep silent and unnoticed in class.

D. get special attention from the teacher.

60. Which is the writer’s attitude to Miss Bean?

A. Grateful.      B. Hateful.      C. Negative.       D. Supportive.

题型:单项选择题

OMC上预先制作小区数据,在小区没有正式入网前,网优平台可以采集其参数、性能等数据。

题型:单项选择题

掌根击法最适宜于操作哪个部位()

A.背部

B.腰部

C.臀部

D.小腿

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