柴油的牌号是以()命名的。例如-20#柴油是()。

题型:填空题

问题:

柴油的牌号是以()命名的。例如-20#柴油是()。

考点:催化裂化装置操作工催化裂化装置操作工题库
题型:填空题

电力系统振荡时,母线电压与线路振荡电流间的夹角,特点为()

A、母线电压超前振荡电流的角度等于线路阻抗角;

B、母线电压超前振荡电流的角度等于原有负荷阻抗角;

C、母线电压与线路振荡电流间的夹角在很大范围内变化

题型:填空题

与受体有较强的亲和力,但内在活性较弱的是()。

A.拮抗剂

B.完全激动剂

C.部分激动剂

D.非竞争性拮抗剂

E.竞争性拮抗剂

题型:填空题

People say time is relative.But relative to what.I do know that sometimes time“seems”to be moving slower.Remember Christmas Eve when you were a child? It was the longest night of the year.It lasted forever! And now it seems like I just paid my bill yesterday...and it’s due again!  

People tell me all too frequently…I need more time! Oh ,really?…Mother Teresa,Michelangelo,and Helen Keller all had 24 hours a day.Look what they did with their time!

Is it that we need to manage our time better…or our priorities(重点)?You’ve heard the expression“first things first.”The first step in understanding the power of time is to understand that it is limited.Why is it then that some people get a lot more done? We know the answer.They use their time smartly.   

One day an expert on time management was speaking to a group of students and announced a quiz.He pulled out a wide-mouthed jar.Next,he placed about a dozen fist-sized rocks,one at a time , into the jat, until no more would fit.“Is it full?” he asked.”Yes,”responds the class.”Oh really?” he asked.So he took out a bucket of gravel(砂砾), which he managed to work down into the spaces between the larger rocks.“Is it full now?” he asked.

Wising up,one answered,‘'Probably not.”Sure enough, he took out a bucket of sand,which he poured into the empty spaces.”Is it full now?” he asked.”No,” reply the students confidently.So he took a glass of water and filled it in.Then he asked,“What is my point?’’

One said,‘'No matter how full your schedule is,if you try really hard,you can always fit some more things into it!”

“No,”the speaker replied,“It tells us if you don’t put the big rocks in first, you’ll never get them in at all.’’

What are the big rocks? The things you should put in to your jar first.

The rich don’t get 25 hours and the poor don’t get 23…we all get the same.Let’s use them wisely! Invest your time wisely!

49.What does the point of the quiz lie in_______.

A.How to put more things into ajar. B.How well the students learn the lesson.

C.How to get more done in limited time      D.The skill and order is very important.

50. “The big rocks”in this passage refers to_______?

A.difficult points.        B.advantages     C.minor things           D.focuses

51. How is the passage mainly developed?

A.By inferring.             B.By comparing.

C.By listing examples.        D.By giving facts.

52. The text is written mainly            

A.to explain the origin of the expression “first things first”

B.to call on us to use our time in a smart manner   

C.to introduce a meaningful class given by an expert

D.to tell us about the relativity and the power of time

题型:填空题

轴测装配图的剖切形式和方法及()更灵活、多样。

A、剖切种类

B、剖切手段

C、剖切位置

D、剖切数量

题型:填空题

某火灾报警及联动控制系统工程,该工程的主要项目是控制事故照明及疏散标记、事故广播及通信、消防给水、排烟系统和自动灭火系统。该工程火灾探测器采用感温变合型探测器,安装完毕后,对该火灾探测器进行现场测试,并由相关部门对该系统进行了验收。

消火栓灭火系统的室内消火栓给水管道若管径小于或等于100mm时,采用()连接。

A.法兰

B.卡箍式

C.螺纹

D.焊接

更多题库