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Which of the following problems could cause the high pressure cutout switch to shut down the compressor in a refrigeration system?A.A shortage of liquid refrigerant.B.Excessive frost on the evaporator.C.Excessive condenser cooling water.D.Insufficient con

题目

Which of the following problems could cause the high pressure cutout switch to shut down the compressor in a refrigeration system?

A.A shortage of liquid refrigerant.

B.Excessive frost on the evaporator.

C.Excessive condenser cooling water.

D.Insufficient condenser cooling water flow.

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相似问题和答案

第1题:

The door was ( ) shut, but we could still hear their heated discussion loud and ( ).

A、closely/ clearly

B、closely/ clear

C、close/ clearly

D、close/ clear


参考答案:B

第2题:

In order to()handling and shipping expenses as()as possible, we suggest that you ship the large order in containers.

A、cut down⋯much

B、cut out⋯much

C、subtract⋯low

D、decrease⋯high


参考答案:A

第3题:

●试题三

阅读下列函数说明和C代码,将应填入(n)处的字句写在答题纸的对应栏内。

【说明】

函数move(int*a,int n)用于整理数组a[]的前n个元素,使其中小于0的元素移到数组的前端,大于0的元素移到数组的后端,等于0的元素留在数表中间。

令a[0]~a[low-1]小于0(初始为空);a[low]~a[i-1]等于0(初始为空);a[i]~a[high]还未考察,当前考察元素为a[i]。a[high+1]~a[n-1]大于0(初始为空)。

【函数】

move(int*a,int n)

{

int i,low,high,t;

low=i=0;high=n-1;

while( (1) )

if(a[i]<0)

{

t=a[i];a[i]=a[low];a[low]=t;

(2) ;i++;

}

else if( (3) )

{t=a[i];a[i]=a[high];a[high]=t;

(4) ;

}

else (5) ;

}


正确答案:

●试题三

【答案】(1)i<=high(2)low++(3)ai>0(4)high--(5)i++

【解析】程序的说明已经对程序的功能和相关变量解释得很清楚了,这儿就不再重复了。由变量i、变量low和变量high的含义和初值可以判断,ihigh之间的元素还未处理,因此while循环条件是"i<=high"或其等价形式,这就是(1)空所填写的内容。

(2)空所在语句块是处理当ai<0的情况,显然这时需要将ai]与alow]进行交换,交换后需要将ilow都要向后移动,因此(2)空处应填写"low++"或其等价形式。

(3)空需要填写执行(4)空所在语句块的条件,由(4)空所在语句块的可以判断,它是处理当ai>0的情况,因此(3)空处应填写"ai>0"或其等价形式。当ai>0时,需要将ai]与ahigh]进行交换,交换后需要将high都要向前移动,因此(4)空处应填写"high--"或其等价形式。注意这时i不能向后移动,因为交换后的ai]还没有处理,需要循环的下一趟进行处理。

ai=0情况,当ai=0时,不需要进行元素交换,只需将i向后移动就可以了,因此(5)空处应填写"i++"或其等价形式。

 

第4题:

对于环境已经恶化的区域,更适合采用state-pressure-response框架制定管理指标体系()For an area where the environment has deteriorated, the State-Pressure-Response framework will be more suitable for the development of its management index system()


C答案:C优化开发区域是指国土开发密度已经较高、资源环境承载能力开始减弱的区域。

第5题:

对切换候选小区做PBGT过滤时,参数HO_MARGIN_QUAL(0,n)是对哪类切换触发原因的小区做过滤()

A.Cause2

B.Cause4

C.Cause7

D.Cause15


参考答案:A, B, C

第6题:

You’re going to have a quiz ( )by another two in the ( )month.

A. followed,followed

B. followed,following

C. following,followed

D. following,following


参考答案:B

第7题:

进行快速话务切换的条件是()

A.AV_RXLEV_NCELL(n)>L_RXLEV_NCELL_DR(n)+max(0,[MS_TXPWR_MAX(n)-P])

B.空闲TCH数目t(n)>FREElevel_DR(n)

C.EN_CAUSE_28=enable

D.Traffic_load(n)<>high


参考答案:A, B, C

第8题:

Which of the listed pressure control valves would be used to establish the maximum operating pressure of a hydraulic system?

A.Pressure-reducing valve

B.Unloading valve

C.Counterbalance valve

D.Pressure-relief valve


正确答案:D

第9题:

I__________have been there,but I__________not find the time.

A.should;would
B.should;could
C.might;could
D.could;could

答案:B
解析:
考查情态动词的用法。句意为:“我本应该去那里,但我没时间。”should have done表示“过去本应做的事而实际上并没有做”,常含有责备、遗憾的语气。

第10题:

对于环境已经恶化的区域,更适合采用()制定指标 For regions where the environment has been deteriorated, it is more appropriate to adopt () for indicator settlement

A.pressure-state-response框架 The pressure-state-response framework

B.state-pressure-response框架 The state-pressure-response framework

C.response-pressure-state框架 The response-pressure-state framework

D.response-state-pressure框架 The response-state-pressure framework


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