45钢是()A、碳素结构钢 B、优质碳素结构钢 C、碳素工具钢 D、优质碳素工具钢

题型:单项选择题

问题:

45钢是()

A、碳素结构钢

B、优质碳素结构钢

C、碳素工具钢

D、优质碳素工具钢

考点:机械工程钢的热处理钢的热处理题库
题型:单项选择题

哪项不是左心功能不全的体征()

A.交替脉

B.心脏浊音界扩大

C.心率增快

D.舒张期奔马律

E.凹陷性水肿

题型:单项选择题

第II卷(40分)

写作(共两节,满分40分)

第一节:短文改错(共10小题;每小题1分,满分10分)

文中共有10处语言错误,错误涉及一个单词的增加、删除或修改。

增加:在缺词处加一个漏词符号(/\),并在该句下面写出该加的词。

删除:把多余的词用斜线(\)划掉。

修改:在错的词下划一横线,并在该词下面写出修改后的词。

注意:1. 每处错误及其修改均仅限一词;

2. 只允许修改10处,多者(从第11处起)不计分。

Attentions, please. 0n Saturday evening there is a talk by a well-known America writer, Sura Jones. You may read her latest novel. It’s in all the bookshops at the moment. Well, a talk will be given at 8 pm on Saturday evening in the library. That’s the building next to Allen Hall,the English Department Building. Miss Jones has just returned back from Africa and will talk about all her experience there. She traveled through three different countries and meet lots of interesting people. Now I’d like to remind you that the talk is for everyone, not just to the fourth-years students. I’m sure the talk will be interesting and hope you all have great time.

题型:单项选择题

男性,65岁,反复咳嗽、咳痰、喘息20年,复发加重1周,口唇发绀,血气分析pH7.30,PaCO248mmHg,PaCO272mmHg。

该患者如果神志恍惚,呼吸36次/分,胸部听诊较多痰鸣音,则治疗上不适宜的措施为()

A.持续低流量吸氧

B.间断吸痰

C.使用呼吸兴奋剂

D.使用祛痰药

E.静脉输注抗生素

题型:单项选择题

关于CO2说法正确的是[ ]

A.碳原子采取sp3杂化

B.CO2是直线型结构

C.干冰是原子晶体

D.CO2为极性分子

题型:单项选择题

涤纶、硅橡胶、普流罗尼等是以()命名的。

A.习惯命名法

B.商品名称命名法

C.系统命名法

D.专业命名法

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