开工中换热器热流未启用,而冷流温度升高,应先打开()或将()打开,以防受热憋压;当用

题型:填空题

问题:

开工中换热器热流未启用,而冷流温度升高,应先打开()或将()打开,以防受热憋压;当用蒸汽吹扫时,吹扫管程要将壳程()打开,防止受热气体膨胀而憋压。

考点:制氢工制氢工综合练习制氢工综合练习题库
题型:填空题

在一张地图上,甲、乙两地的图上距离是3cm,而两地的实际距离为1500m,那么这张地图的比例尺为(    )。

题型:填空题

—How is the boy?

—Sorry.He__________though the doctor made every effort to save him.

A.died

B.was dead

C.had died

D.has been dead

题型:填空题

语言综合运用:

人世间,有一种情感,她无形,无偿,无价,无尽;她是爱的起点,是生命永恒的动力:这就是亲情。在我们的人生经历中,谁没有关于亲情的刻骨铭心的记忆?

不出现“爱”字,描写你生活中体现亲情的一个难忘的情景(场景),抒发自己最深切的感受。

要求:

(1)主要运用描写、抒情的表达方式;

(2)要有细节描写,并动用比喻、反问的修辞手法;

(3)结构相对完整,语言简明、准确、生动;

(4)不少于200字。

题型:填空题

Busy senior managers need no longer waste time in showering themselves-an Australian company has invented a suit that can be worn while they wash.

The suit has been specially designed so that it can be cleaned under the showerhead. There is no need for soaking (浸泡),dry cleaning-or even soap.

The Japanese market has taken a liking to the “shower suit”,described as “revolutionary” by its owner Australian Wool Innovation (AWI),which is the research and marketing body that represents Australian wool-growers. Orders have been placed for 170,000 of the woolen suits.

The suit could be worn in the shower,although it was probably better to hang it on a clothes hanger and carry it instead,AWI corporate affairs spokesman Stephen Feighan said.“The idea is that you hang it up and then...you give it a spray (喷雾),and it’s dry the next morning,” Mr Feighan said.

A Japanese researcher working for AWI invented the suit by combining three technologies. The secret is the best lining (内衬),which allows the suit to dry quickly.The shower suit attracted busy corporate people,particularly those who often traveled or stayed up late,Mr Feighan said.The airline industry was also interested.

Mr Feighan confessed he had not worn one of the suits yet,or tried to wash it in the shower,because they cut to fit Japanese figures.AWI believes that the shower suit will spread from the Japanese market through Europe and India. Mr Feighan hoped the suit,made from local wool,would be available in Australia in 12 to 18 months’ time.

小题1:What is the writing purpose of the article?

A.To introduce a newly-designed shower suit.

B.To help the white collars arrange their life more sensibly.

C.To provide suggestions on saving time in bath.

D.To praise AWI for its important achievement.小题2:Which is true about the suit according to the passage?

A.It can spare the owner’s trouble of soaking,dry cleaning and applying soap.

B.It is of the quality of fast dry for its best cloth.

C.It is not suitable for hanging.

D.It has attracted more orders than any other suit.小题3:The suit draws the attention from all the following groups EXCEPT________.

A.corporate people who are always on the go

B.people on occasional business trips

C.the airline industry

D.people burning the midnight oil小题4:Which of the following has much to do with Mr Feighan?

A.The invention of the suit.

B.The try-on of the suit.

C.The combination of the three technologies on the suit.

D.The popularization of the suit and best wishes for it.

题型:填空题

如图所示,表面粗糙的固定斜面顶端安装一个定滑轮,小物块A、B用轻绳连接并跨过定滑轮(不计滑轮的质量和摩擦).初始时刻,手扶物块B使A、B处于静止状态.松手后A下落,B沿斜面上滑,则从松手到物块A着地前的瞬间(  )

A.物块A减少的机械能等于物块B增加的机械能

B.轻绳对物块B做的功等于物块B的机械能增量

C.轻绳对物块A做的功等于物块A的机械能变化量

D.摩擦力对物块B做的功等于系统机械能的变化量

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