谢谢o(∩_∩)o...哈哈要锻造一个直径为12cm,高为10cm的圆柱形零件,需要直径为16cm的圆柱形钢条多少厘米.

正面：坚定不移
反面：痴心妄想
精卫填海,原比喻有冤必报,现多比喻不畏艰难,奋斗不懈,不达目的不罢休的意志.也比喻不自量力.
近义：愚公移山
反义：一曝十寒

3x-2y-5z=0,2x-5y+4z=0
x=(2y+5z)/3,x=(5y-4z)/2
(2y+5z)/3=(5y-4z)/2,y=2z,x=3z
3x的平方+2y的平方+5z的平方/5x的平方+y的平方-9z的平方
=3*9z^+2*4z^+5z^/5*9z^+1*4z^-9z^
=40z^/40z^
=1

jia
笳

排比

=1/9-1/5-1/5+1/6
=1/9+1/6
=2/18+3/18
=5/18

We should pick up some rubbish and throw it into a dustbin.
We should collect waste paper or bottles for recycling.
We should plant trees or flowers in or near our neighbourhood.
We should do something useful to improve the invironment.
We should not throw any litter onto the ground.
We should not draw pictures on public walls.
We should not spit in a public place.
We should not cut down trees..
提供一些好的句子~

【Water Tap】水龙头

已为你写好,请查收,若有疑问及时追问,满意敬请采纳,O(∩_∩)O谢谢~~

在非洲有一条大河,这大河里住着两条鳄鱼,大河的岸上长着许多棕榈树,大河的中心是个小岛,岛上长着许多香蕉树.有一天,两条鳄鱼浮在水面上,大鳄鱼对小鳄鱼说；“孩子、你瞧,岸上那棕榈树!”小鳄鱼一看,啊,那棵棕榈树上有只小猴子,活蹦乱跳的.
“孩子,这几天妈妈嘴巴淡得很,想吃点什么新鲜的.你去把那猴子捉了来,我要吃他的心.”“妈呀,我怎么捉得住猴子呢?猴子又不下水来,我又爬不了树.这事儿不好办.”“你好好儿想一想,会想出办法来的.”
小鳄鱼想了半天,真的想出个办法来了.他爬上了岸,爬到棕榈树跟前,仰着头,对小猴子说：“小猴子,你玩了这半天,肚子不饿吗?”“我真的觉得饿了,你听,肚子咕噜咕噜地叫呢!”
“你想吃香蕉吗?你瞧,那个小岛上香蕉可多啦!”
“不行啊,我不会游泳,怎么去呀?”
“咱们是老邻居了,我来帮你个忙吧!你骑在我的背上,我把你带到小岛上去,让你吃痛快.”“啊,那太好了!嘻嘻嘻……我得谢谢你了!嘻嘻嘻……”小猴子从树上跳下来,正好跳到小鳄鱼的背上.小鳄鱼驮着小猴子下了河,游呀,游呀,突然,把身上往下一沉,吓得小猴子哇哇叫：“哎呀,小鳄鱼,你可别开玩笑,我会淹死的.你快点游,游到小岛上去,我好吃香蕉.”“嘿嘿,你想吃香蕉?我妈正等着吃你的心哪.”小猴子这才知道自己嘴馋,上了小鳄鱼的当.怎么办呢?他想了一想,对小鳄鱼说：“你妈想吃我的心,好啊,你怎么不早告诉我?我光想着吃香蕉,把嘴带来了,可没把心带来.”“那你的心呢?”
“我的心搁在棕榈树上呢.”
“啊!那咱们快回到岸上去,你把你的心带来.”小鳄鱼转过身子,游到岸边,小猴子连忙跳上岸去,三蹦两跳地上了棕榈树.
There is a big river in Africa,live two crocodiles in this big river,the estuary coast grows many palm trees and the estuarine center is an islet and grow many banana trees on the island.One day,two crocodiles float on the surface and the big crocodile says to the small crocodile;"Kid,your lo,coast that palm tree!"Once the small crocodile see,,there is a small monkey on that palm tree and live to leap frisky.
"Kid,mother's mouth is thin very this several days,want to eat a point what fresh.You went to catch that monkey and I wanted to eat his heart.""Mama ah,I how catch live monkey?The monkey doesn't enter water again and I can't climb a tree again.This matter son is difficult to do.""You the very good son consider,will figure out a way of."
The small crocodile thought along while and really devised a plan to come.He climbed to go ashore and climb to palm tree front of,the Yang wears a head and say to the small monkey:"Small monkey,you played this along while and isn't the belly hungry?""I really felt hungry and you listen to and does the belly murmur murmur ground call!"
"Do you want to eat banana?Your lo,the banana is many on that islet!"
"Don't go,I can't swim and how go to?"
"We were old neighbors,I to help you favour!You ride at my carry on the back up,I take you to the islet up,let you eat to heart's content."",That liked too much!Xi Xi Xi ……I have to thank you!Xi Xi Xi ……"the small monkey has at the right moment jumped carry on the back of small crocodile since the tree jump down.The small crocodile Duo wore small monkey to descend river and swim ah,swim ah,suddenly,body downwards on sink frighten small monkey call:"Oh,small crocodile,you can don't be kidding and I will drown.You quickly swim,visit islet up,I delicious banana.""Hey Hey,do you want to eat banana?My mama is wait for to eat you of heart which."Small monkey this just knows oneself is greedy and ascended small crocodile of be.How to do?He thought on think,say to the small crocodile:"Your mama wants to eat my heart,good,you how late tell me?I only wanted to eat banana,brought a mouth,didn't bring heart.""That you of heart?"
"Does my heart put on the palm tree."
"!That we return to quickly to coast go,you you of the heart bring."The small crocodile once turns body,visit near the bank,the small monkey hurriedly jumped up shore to go to,three leap two jumped ground to ascend palm tree

1 不三不四 一心一意 无忧无虑 有始有终 大模大样 自暴自弃
2 不慌不忙 一生一世 无影无踪 有声有色 大是大非 自吹自擂
3 不屈不挠 一针一线 无缘无故 有血有肉 大摇大摆 自高自大
4 不亢不挠 一草一木 无边无际 有头有脸 大风大浪 自给自足
5 不伦不类 一言一行 无法无天 有利有弊 大吃大喝 自生自灭
6 不伦不类 一薰一莸 无穷无尽 有头有尾 大吹大擂 自言自语
7 不即不离 一本一利 无声无息 有板有眼 大慈大悲 自由自在
8 不骄不躁 一瘸一拐 无声无臭 有尽有让 大鸣大放 自怨自艾
9 不管不顾 一歪一扭 无拘无束 有棱有角 大吵大闹 自作自受 相辅相成
10 不稂不莠 一问一答 无大无小 有情有义 大手大脚 自私自利 相反相成
11 不偏不倚 一唱一和 无尽无休 有说有笑 大鱼大肉 自卖自夸 相亲相爱
12 不破不立 一起一落 无时无刻 有偏有向 大红大绿 自觉自愿
13 不衫不履 一张一弛 无依无靠 有凭有据 大澈大悟
14 不闻不问 一上一下 无拳无勇 有条有理
15 不痛不痒 一东一西 无偏无党 有头有绪
16 不明不白 一长一短 无咎无誉 有根有据
17 不干不净 一模一样 无冬无夏 有权有势
18 不清不楚 一丝一毫
19 不言不语 一朝一夕
20 不蔓不枝 一板一眼
21 不知不觉 一五一十
22 不依不饶 一字一板
23 不理不睬 一心一德
24 不声不响 一手一足
25 不见不散 一步一德
26 不夷不惠 一龙一蛇
27 不怯不求 一龙一猪
28 不愧不作 一成一旅
28 不稼不穑 一饮一啄
30 不上不下 一步一鬼
31 一字一珠
32 一琴一鹤

一 洛阳城里又见瑟瑟秋风吹起,在洛阳城内住着一位诗人——张籍.他每天都有很多事情要做,可他心里又非常想念他的家乡,但自己又没有时间写信给家里的人.这几天洛阳城里的人们都在说：“为什么我多年没见的儿子还没写信...

吃中饭的时间到了.

秋天一到,树叶就变黄,飘落,回到母亲的怀抱.

………

涕泗滂沲
【解释】:谓涕泪如雨.形容涕泪流得极多.同“涕泗滂沱”.
【出处】:《南齐书·孔稚珪传》：“孔稚珪,字德璋,会稽山阴人也.祖道隆,位侍中.父灵产,泰始中罢晋安太守.有隐遁之怀,于禹井山立馆,事道精笃,吉日于静屋四向朝拜,涕泗滂沲.”
淡沲 滂沲 澹沲 潭沲 江沲 颓沲 滹沲