低合金耐热钢气焊时选用(),能使火焰很好地保护熔池和焊缝金属。A、中性焰或轻微碳化焰

题型:单项选择题

问题:

低合金耐热钢气焊时选用(),能使火焰很好地保护熔池和焊缝金属。

A、中性焰或轻微碳化焰

B、强氧化焰

C、强碳化焰

D、弱氧化焰

考点:焊工技能考试初级气焊工考试初级气焊工考试题库
题型:单项选择题

阅读理解。

     How many people have I met who have told me about the book they have been planning to write but

have never yet found the time? Far too many.

     This is life, all right, but we do treat it like a rehearsal (排演) and, unhappily. we do miss so many of its

best moments.

     We take johs to stay alive and provide homes for our families always making ourselves believe that this

style of life is merely a temporary (暂时的) state of affairs along the road to what we really want to do. Then,

at 60 or 65, we are suddenly presented with a clock and several grandchildren and we look back and realize

that all those years waiting for real life to come along were in fact real life.

     In America they have a saying much laughed at by the English: "Have a nice day." They speak slowly and

seriously in their shops, hotels and sandwich bars. I think it is a wonderful phrase, reminding us, in effect, to

enjoy the moment.

     How often do we say to ourselves, "I'll take up horse-riding (or golf, or sailing) when I get a higher

position," only to do none of those things when I do get the higher position.

     When I first became a reporter I knew a man who gave up a very well paid respectahle job at The Daily

Telegraph to go and work for a small weekly newspaper. At the time I was astonished by what appeared to

me to be his completely abnormal (反常的) mental state. How could anyone turn his back on Fleet Street in

central London for a small local area? I wanted to know.

     Now I am a little older and possibly wiser, I see the sense in it. In Fleet Street the man was under

continual pressure. He lived in an unattractive London suburb and he spent much of his life sitting on Southern

Region trains.

1. The underlined phrase "turn his back on" most prohably means "________".

A. give up

B. keep on

C. try out

D. look for

2. The man preferred working for a small newspaper partly because ________.

A. something had gone wrong with his mind

B. he wanted to have more time to enjoy life

C. he would have more chances to make money

D. he liked travelling on Southern Region trains

3. What is probably the best title for the passage?

A. Find a Good Job

B. Wait for Real Life

C. Value This Very Day

D. Get a Higher Position

题型:单项选择题

下列属于税收征收管理措施的有()。

A.延期纳税

B.出境清税

C.加收滞纳金

D.税务机关行使撤销权

题型:单项选择题

经过招标后,A省B医院从C医药公司采购D药品生产企业生产的某注射液。在临床应用过程中,注射液发生了死亡病例。

在实施召回的过程中,向所在地省级药品监督管理部门报告药品召回进展情况的频率为()。

A.每日

B.每2日

C.每3日

D.每7日

题型:单项选择题

声卡是PC机的一种重要的组成部件。下面有关声卡的叙述中,错误的是

A.波形声音可以通过对话筒输入的声音进行采样、量化而获得

B.声卡必须支持混音处理功能

C.声卡必须支持MIDI音乐合成和语音合成的功能

D.数字信号处理器是声卡的核心部件之一,它完成数字声音的编码、解码等操作

题型:单项选择题

排卵时从卵巢排出的是:()。

A.整个成熟卵泡

B.初级卵母细胞

C.次级卵母细胞、透明带

D.次级卵母细胞、透明带、放射冠

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