3x+8=5x-6解方程 急解方程x²-4x=0

急解方程x²-4x=0  

急解方程x²-4x=0

x(x-4)=0
x=0或x=4

一道初三的化学题???急

先搞明白混合物和化合物的定义。
混合物是由两种或多种物质（由两种及两种以上 纯物质(单质或化合物)）—混合而成的 。
化合物由两种或两种以上元素的原子（指不同元素的原子种类）组成的纯净物。
混合物：食盐（主要为NaCl,家里吃的食盐里含其他物质）
石灰石（主要为CaCO3，含其他物质）
生理盐水（溶液均为混合物）
化合物：干冰、 纯碱、 烧碱
红磷 、水银是单质。

【急】高一英语题，在线等。

getting along with

have got to

face to face

add up

横线上怎么写！英语！急

We had a good time in the park............
He is too young to take care of himself.
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O(∩_∩)O，互相帮助，祝共同进步！

帮忙翻译成英文 急

Animal protection is to protect human
Since the human beings, we are constantly evolve at the same time also in constant hurt those lovely animals. They have no fault, they just aording to the law of nature peaceful life. But since had human existence, their homes are being more and more small. Some animals have even made extinct.
In extinct animals, bag Wolf is most miserably. Long ago in bag Wolf life in vast prairie, they passed quickly live, carefree. Since human's arrival changed their lives. Because of human large rodeos, livestock make green grass bees to less and less, many herbivores migrated to other grasslands. So with thewissen feed bag Wolf will have no food. They began to steal human farm animals. The farmer will hate played a bag of wolves, see one killed one, so at last a wild bag Wolf also was killed. When people realized bag Wolf will bee extinct, began to protect the park last a bag of wolves, this only bag Wolf after only a last 48 days the good old days. And 48 days, bag Wolf disappear from the earth forever, forever!
Of course not all extinct animals are human kill, have a plenty of not adjust to changes in the environment and destroy. But the extinction of some animals, the mankind has an unshirkable responsibility. Human since ancient times have been badly treated with those animals, human deprived of their right to life.
Now people doesn't seem to realize an animal's destroy the harm. In order to make money people would do anything, they put fur sell to store, the animal flesh to sell to the restaurant. But we can't blame everything made to vendors head, consumer also have a responsibility, if no consumer demand so vendors will not bold. Humans also eatting a wild animal. For example: snake. If snakes extinct, pyramid scheme wantonly breeding, at that time we do...
Therefore each species has its the meaning of existence, they are all in the laws of nature to survive. If the chain of a broken, then another kind of animal will raise breeding, even threatening human, everyone remember protected animals. Animal protection is to protect human oneself!

帮忙写一份检讨书急

检讨书如下
同学们好。今天我检讨一件事，中午时我回到教室听到有人说要去打架，我就跟着一起去凑热闹，真的只是凑热闹，我没动手也没开口，可是我知道，从法律上来说，虽然我旁观，依然是犯法。经过老师的教导，我知道了自己的行为不止扰乱了学校秩序，也对我们学校的风气造成了一定影响。我已经认识到了自己的错误。
我非圣贤，怎会无过，虽然我曾这样安慰自己，可是这个世界上，很多事情是没有重新再来的机会的，在少年时期犯的错，我会牢记在心，并时时提醒和约束自己。我在此向同学们保证，以后一定不再犯类似的错误，请同学们和老师监督我。以后我有什么做得不好的，也希望大家真心的对我指出，有则改之，无则加勉。我的检讨完了，谢谢大家。
字数到了吗？

java实训总结怎么写啊，急！

看你学会了什么，就写什么吧。。。。

急!! 跪求答案，拜托拜托

25、（1）因为EAF、EDB两个三角形全等，所以AF=BD,又因为BD=DC,所以AF=DC,
由上面全等还可得出角FAE=角EDB，所以角FAF+角ADC=180°，即证。
(2)AB=AC的等腰三角形或等边三角形
26、（1）ED=FB,CE=CF
(2)28

世界遗产导游词。。。。。。。急!

你是不是四年级的.我也急啊!!!!!!!!

0.4x+12=0.5(x-30)怎么解急！

0.4x+12=0.5(x-30)
0.4x+12=0.5x-15
0.5x-0.4x=12+15
0.1x=27
x=270