割草机离合器怎么换
动力连接操作杆的4个螺丝拆卸，有电动扳手或者充电的扳手，一个17的套头，正丝的，拆卸就可以了，一个弹簧的离合器上下2个垫子，上面是弹垫，下面是平垫。割草机（Lawn mower）又称除草机、剪草机、草坪修剪机等。割草机是一种用于修剪草坪、植被等的机械工具，它是由刀盘、发动机、行走轮、行走机构、刀片、扶手、控制部分组成。刀盘装在行走轮上，刀盘上装有发动机，发动机的输出轴上装有刀片，刀片利用发动机的高速旋转在速度方面提高很多，节省了除草工人的作业时间，减少了大量的人力资源。
grass 和 lawn 表示草坪有什么区别啊
grass 和 lawn 表示草坪的区别：1、grass 表示：草；草地，多指自然形成的；多用于大范围的,自然状态的草原.2、lawn表示：草坪；是人工塑成的。多用于小范围的,比如家庭或者公园的草坪.grass 英 [ɡrɑːs] 美 [ɡræs] n. 草；草地vt. 喂(草)；(以草)覆盖；告发lawn英 [lɔːn] 美 [lɔn]n. 草地，草坪;上等细麻布拓展资料：双语例句1. I let the horse drop his head to crop the spring grass. 我让马低下头啃吃春天的青草。2. The windows overlooked a lawn of tall waving grass. 窗户外边是一块草地，高高的草随风摇摆。3. Mr Zuma had a solid reputation as a grass roots organiser. 作为一个民众的组织者，祖玛先生名声甚佳。4. He continued to mow the lawn and do other routine chores. 他继续剪草坪，并做些其他日常杂务。5. The Lawn Tennis Association suspended Mr Castle from the British team. 草地网球协会暂停了卡斯尔先生在英国队的职务。6. She swivelled her chair round and stared out across the back lawn. 她把椅子转过来，向外凝视着屋后的草坪。
提问一道英语题，请告诉我答案并且分析每一个选项，谢谢
新概念三的题吧
听力原文：
Lesson 46
Do it yourself
自己动手
Listen to the tape then answer the question below.
听录音，然后回答以下问题。
Did the writer repair his lawn mower in the end? Why/Why not?
So great is our passion for doing things for ourselves, that we are becoming increasingly less dependent on specialized labour. No one can plead ignorance of a subject any longer, for these are countless do-it-yourself publications. Armed with the right tools and materials, newlyweds gaily embark on the task of decorating their own homes. Men, particularly, spend hours of their leisure time installing their own fireplaces, laying out their own gardens; building garages and making furniture. Some really keen enthusiasts go so far as to build their own computers. Shops cater for the do-it-yourself craze not only by running special advisory services for novices, but by offering consumers bits and pieces which they can assemble at home. Such things provide an excellent outlet for pent up creative energy, but unfortunately not all of us are born handymen.
Some wives tend to believe that their husbands are infinitely resourceful and can fix anything. Even men who can hardly drive a nail in straight are supposed to be born electricians, carpenters, plumbers and mechanics. When lights fuse, furniture gets rickety, pipes get clogged, or vacuum cleaners fail to operate, some woman assume that their husbands will somehow put things right. The worst thing about the do-it-yourself game is that sometimes even men live under the delusion that they can do anything, even when they have repeatedly been proved wrong. It is a question of pride as much as anything else.
Last spring my wife suggested that I call in a man to look at our lawn mower. It had broken down the previous summer, and though I promised to repair it, I had never got round to it. I would not hear of the suggestion and said that I would fix it myself. One Saturday afternoon, I hauled the machine into the garden and had a close look at it. As far as I could see, it needed only a minor adjustment: a turn of a screw here, a little tightening up there, a drop of oil and it would be as good as new. Inevitably the repair job was not quite so simple. The mower firmly refused to mow, so I decided to dismantle it. The garden was soon littered with chunks of metal which had once made up a lawn mower. But I was extremely pleased with myself. I had traced the cause of the trouble. One of links in the chain that drives the wheels had snapped. After buying a new chain I was faced with the insurmountable task of putting the confusing jigsaw puzzle together again. I was not surprised to find that the machine still refused to work after I had reassembled it, for the simple reason that I was left with several curiously shaped bits of metal which did not seem to fit anywhere. I gave up in despair. The weeks passed and the grass grew. When my wife nagged me to do something about it, I told her that either I would have to buy a new mower or let the grass grow. Needless to say our house is now surrounded by a jungle. Buried somewhere in deep grass there is a rusting lawn mower which I have promised to repair one day.
New words and expressions 生词和短语
plead
v. 找（借口），辩解
ignorance
n. 无知，不懂
publication
n. 出版物
newlyweds
n. 新婚夫妇
gaily
adv. 愉快地，高兴地
leisure
n. 空闲
keen
adj. 热心的，渴望的
advisory
adj. 咨询的
novice
n. 新手
consumer
n. 消费者，顾客
assemble
v. 装配，组装
outlet
n. 出路
creative
adj. 创造性的
handyman
n. 手巧的人，能工巧匠
resourceful
adj. 足智多谋的
fuse
v. 由于烧断保险丝而短路
rickety
adj. 要散架的，晃动的
clog
v. 堵塞
delusion
n. 错觉
lawn mower
割草机
adjustment
n. 调整
screw
n. 螺丝钉
dismantle
v. 拆卸
chunk
n. （厚）块
snap
v. 绷断
insurmountable
adj. 不能克服的，难以对付的
jigsaw
n. 线锯
nag
v. 唠叨不休
rust
v. 生锈
参考译文
现在我们自己动手做事的热情很高，结果对于专业工人的依赖越来越少了。由于出版了不计其数的教人自己动手做事的书报杂志，没有人再能说对某事一无所知。新婚夫妇找来合适的工具和材料，喜气洋洋地开始布置新房。特别是男人，常利用空闲时间安装壁炉、布置花园、建造车库、制作家具。有些热衷于自己动手的人甚至自己组装电脑。为了满足自己动手热的需要，商店不仅为初学者提供专门的咨询服务，而且为顾客准备了各种零件，供他们买回家去安装。这些东西为人们潜在的创造力提供了一个绝妙的用武之地。但不幸的是，我们并非人人都是能工巧匠。
妻子常常认为她们的丈夫无比聪明能干。甚至那些连一枚钉子都钉不直的男人都被认为是天生的电工、木匠、水管工和机械师。每当电灯保险丝烧断、家具榫头松动、管道堵塞、吸尘器不动时，有些妻子认为丈夫总有办法。自己动手的例子中最糟糕的是，有时甚至是男人尽管接连失败却还误以为自己什么都行，原因就是要面子。
今年春天，妻子让我请人检查一下我家的割草机。那台割草机去年夏天就坏了，尽管我答应修，但一直没抽出时间，我不愿听妻子的建议，说我自己会修。一个星期六的下午，我把割草机拉到了花园里，仔细检查了一番。在我看来，只需稍加调整即可。这儿紧紧螺丝，那儿固定一下，再加几滴油，就会像新的一样了。事实上，修理工作远不是那么简单。修完后割草机还是纹丝不动。于是，我决定把它拆开。一会儿工夫，割草机便被拆成一个个金属零件，乱七八糟地堆在花园里。但我却非常高兴，因为我找到了毛病所在。驱动轮子的链条断了一节。我买来一根新链条后，面临的就是如何把这些令人眼花缭乱的拼板重新组装起来。等我装完后，那台割草机仍然一动不动，对此我倒并不感到吃惊。原因很简单，因为还剩下几个形状奇特的零件似乎哪里也装不上去。我无可奈何，只好罢休。几个星期过去了，草长了起来。妻子喋喋不休让我想点办法。我告诉她，要么买一台新割草机，要么让草长下去。不用说，我家现在已被丛林包围。深草丛中的某个地方有一台正在生锈的割草机，那就是我曾答应某日要修理的割草机。 2. [已通过] “sarah1983”提供 注：截至2008-07-26 09:46:09网友提供的最好的听力原文 L46-08 begin 12’09”
【Vocabulary】 P214
Explain the meanings of the following words and phrases as they are used in the passage: inreasingly(l.2); plead ignorance (l.3); gaily embark on the task (l.5); installing (l.7); novices (l.9); repeatedly (l.17)
increasingly: more and more
plead ignorance 找借口辩解说不知情（=get an excuse for not knowing）
gaily embark on the task: happily start the job
installing: fixing
novice: 新手 beginner / learner
repeatedly : 反反复复地，重复地 （=again and again; renewedly）
【Multiple choice questions】
Comprehension
1 Why did the writer’s wife suggest calling in a man to look at the mower?
a. To get her husband to mend it, believing him to be a born carpenter.
b. She had forgotten that her husband had promised to mend it.
c. She suspected it would otherwise remain unrepaired and the grass uncut.
d. Her husband had repeatedly tried mending it already without success.
suspected (that )... / doubt whether...
remain unrepaired uncut
2 The writer decided to dismantle the mower because _____ .
a. it was a Saturday and he had the time to spare
b. he had discovered the cause of the trouble
c. he thought it was a sure way of roving it would not work
d. what repairs he had already carried out had not proved adequate
dismantle: take apart 拆开
adequate: enough
背熟：what repairs he had already carried out had not proved adequate
3 The writer’s house is now surrounded by a jungle because _____ .
a. he lost several pieces of the mower in the process of dismantling it
b. by now the lawn mower is too rusty to cut the grass with
c. besides not having cut the grass, he has failed to cut down the trees
d. his wife was not prepared to let him buy a new lawn mower
be prepared to do
Structure
4 ★★★ ---- that we are _____ dependent on specialized labour as we used to be. (ll.1-2)
a. increasingly less b. becoming not so c. not nearly as d. becoming less
as...as
used to be
Eg: He doesn’t work as hard as he used to.
5 Whatever it is, a fused light, _____ furniture, a clogged pipe, a broken-down vacuum cleaner, wives automatically assume... (ll.14-15)
a. shaked b. a shaken c. a shaky d. shaky
平行结构
6 ---- my wife said to me: ‘Darling, _____ call someone in to look at the lawn mower?’ (l.18)
a. why don’t you b. why you don’t c. would you be kind to d.do you kindly
suggest doing sth. ----Why don’t you? Why not?
7 ---- which I have promised to get round _____ one day. (l.19)
a. to repair it b. to repairing c. repairing d. to repairing it
get round to doing / come round to doing
Vocabulary
8 To plead ignorance of a subject is no longer a _____ , for there are... (ll.2-4)
a. wise precauting b. literary discussion c. legitimate excuse d. reasonable allowance
precaution: 预防措施 take precautions
legitimate: reasonable
9 Men, _____ spend hours of their leisure time on do-it-yourself. (ll.6-7)
a. mostly b. especially c. rather d. specially
particularly, especially
10 Some women assume that their husbands will somehow put things _____ (ll.14-15)
a. in order b. well c. in straight d. correctly
L46-08 end 12’09”
L46-09 begin 0’37”
11 I was left with bits of metal which did not seem to _____ anywhere. (l.28)
a. fasten b. suit c. go d. fix
suit 指合乎要求，口味，性格
12 _____ , our house is now surrounded by a jungle. (ll.29-30)
a. As a matter of fact b. As you can imagine c. As a result d. As a last resort
【Key to Multiple choice questions】
1. C 2. D 3. D 4. C 5. D 6. A 7. B 8. C 9. B 10. A 11. C 12. B
L 46-09 end 0’37” Lesson46B end 54:56 Lesson46 end 1:43:28
