(1)解二元一次方程组3x+5y=82x-y=1(2)化简:(1-yx+y)÷x

题型:解答题

问题:

(1)解二元一次方程组
3x+5y=8
2x-y=1

(2)化简:(1-
y
x+y
x
y2-x2
考点:二元一次方程组的解法分式的加减乘除混合运算及分式的化简
题型:解答题

下图是元素周期表中的一格,根据图中的信息判断,下列叙述错误的是

[ ]

A.氖的原子序数为10

B.氖属于稀有气体元素

C.氖的一个原子核外有10个电子

D.氖的相对分子质量为40.36

题型:解答题

(四)
某35kV电气装置工程项目,施工项目经理部为了保证施工项目按期完成,使资源配置尽量达到合理和最大限度地降低成本,就组织人员进行施工进度计划的编制,编制采用的方法是横道图施工进度计划。
在施工过程中的部分施工工序和要点如下:
(1)坚持先交接试验后通电运行,先接电启动后模拟动作的原则进行。
(2)在做电气交接试验时,高压电气部分做绝缘强度和继电保护试验。
(3)在做电气交接试验时,低压电气部分主要是做继电保护试验。
(4)在负荷试运行时要根据工程师的要求决定是否要联合编制负荷试运行方案。
(5)所有电气试运行时必须在空载状态下进行。
(6)电气设备安装技术人员应配合土建工程进行预留和预埋工作。

问题


采用横道图编制机电安装工程施工进度计划有何优点?

题型:解答题

阅读理解。

     Many people often lose their friends and they don't know how to keep a long friendship.So

how can you keep a long friendship? The following passage explains very well about this matter.

     The first thing you need to do is to become a good listener.In this way,you show your friends

that you are interested in their lives.You want to know more about them and you want to help

them solve their problems.They will cherish the friendship more if they know you care about them.

     The next thing is that you should respect other people's privacy (隐私).People usually don't

like others to know about their private life,so you should show respect toward their privacy.

Sometimes,they need some suggestions from others,but this does not mean that others can know

about their entire life.So respect for privacy is a must for keeping a long friendship.

     The third important thing is that you need to be able to forgive.You must remember that nobody

 is perfect in this world.It is important to forgive others and not to blame them for the mistakes they

have already made.You are not perfect either.Thus you need to apologize to others for the mistakes

you may have made.

     Pay attention to the three things above,and you will be able to have long friendships.

1.This passage is written to tell us________.

A.why a long friendship is important

B.what we can do for our friends

C.how to make friends with others

D.how to keep a long friendship

2.According to the passage,what is the first thing that we need to do?

A.To know more about our friends.

B.To share our happiness and sadness.

C.To be good at listening to our friends.

D.To help our friends solve their problems.

3.From Paragraph 3 we know that________.

A.we should never share our private lives with others

B.some people never care about their privacy

C.it is important to respect other people's privacy

D.some people like sharing their privacy

4.What does the writer suggest you do if your friend makes a mistake?

A.Blame him.      

B.Forgive him.

C.Tell him why it is so.      

D.Leave him immediately.

5.The writer most probably thinks that________.

A.everyone makes mistakes

B.some people are perfect

C.people often make stupid mistakes

D.we shouldn't apologize fpr every mistake

题型:解答题

某政府机关科长小王最近被调到某国有企业任副厂长,这种交流形式属于:

A.转任
B.挂职锻炼
C.轮岗
D.调任

题型:解答题

青铅接口的铅面凹进承口2mm,表面凹凸不平者,则为捻口不良。( )

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