首页
登录
职称英语
You should spend about 20 minutes on this task. The diagrams below show
You should spend about 20 minutes on this task. The diagrams below show
游客
2024-01-09
45
管理
问题
You should spend about 20 minutes on this task.
The diagrams below show the life cycle of the silkworm and the stages in the production of silk cloth.
Summarise the information by selecting and reporting the main features, and make comparisons where relevant.
Write at least 150 words.
选项
答案
The first diagram shows that there are four main stages in the life of the silkworm. First of all, eggs are produced by the moth and it takes ten days for each egg to become a silkworm larva that feeds on mulberry leaves. This stage lasts for up to six weeks until the larva produces a cocoon of silk thread around itself. After a period of about three weeks, the adult moths eventually emerge from these cocoons and the life cycle begins again.
The cocoons are the raw material used for the production of silk cloth. Once selected, they are boiled in water and the threads can be separated in the unwinding stage. Each thread is between 300 and 900 meters long, which means they can be twisted together, dyed and then used to produce cloth in the weaving stage.
Overall, the diagrams show that the cocoon stage of the silkworm can be used to produce silk cloth through a very simple process.
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3348156.html
相关试题推荐
OUTSKIRTS:TOWN::A、wine:gobletB、leaf:plantC、shoulder:thoroughfareD、wing:heli
Peopleshouldnottakegoodconstitutionforgranted,forhumangeneticcodeis
OUTSKIRTS:TOWN::A、wine:gobletB、leaf:plantC、shoulder:thoroughfareD、wing
African-Americanfilmmakersshouldbeinanenviableposition,fors
African-Americanfilmmakersshouldbeinanenviableposition,fors
SASH:WAIST::A、sock:handB、fringe:ankleC、ring:wristD、epaulet:shoulder
MEETING:MINUTES::A、video:imageB、report:synopsisC、seism:quiverD、perfo
Hispenchantforlearninghistoryshouldprovetobe______duringhisstudiesto
Sendingarobotintospacetogatherinformationisaviableoption,butshould
Sendingarobotintospacetogatherinformationisaviableoption,butshould
随机试题
Wecannotusethebridgenow,becauseit______.A、hasbeenrepairedB、isrepair
[originaltext]M:Ididn’tseeyouincreativewritingclasstoday.Whathappene
【B1】[br]【B5】A、escortB、protectC、accompanyD、leadD语义衔接题。这句承接前面的意思,早期探测地球的时候,人
加入表面活性剂会A.减低界面张力 B.增加界面张力 C.不改变界面张力 D
小型装饰机械,主要包括()。A.蛙式打夯机 B.水泥抹光机 C.水磨石机
下列疾病,胸片可见肺血减少的是A.室间隔缺损 B.风湿性心脏病二尖瓣狭窄 C
根据监管规定,商业银行所面临的流动性风险分为()。A.投资流动性风险 B
临床出现自汗、多尿、出血、遗精等症,为气的何种功能减退A.防御作用 B.固摄作
心理治疗关系的建立原则包括A.单向性、开放性、时限性 B.系统性、单向性、时限
银行承兑汇票的承兑银行,应当按照票面金额向出票人收取()的手续费。A:千分之一
最新回复
(
0
)