首页
登录
职称英语
[img]2022m1s/ct_ve01004001z2021j_eyyjsad_0192_220106[/img] [br] [originaltext]
[img]2022m1s/ct_ve01004001z2021j_eyyjsad_0192_220106[/img] [br] [originaltext]
游客
2024-08-04
4
管理
问题
[br]
The scalpel is one of the oldest inventions in medicine. It is a small, light and very sharp knife. People used it for the first time around 3000 BC in the area of modern Iraq. The scalpel did not change very much for 4,000 years.
The Chinese invented acupuncture needles around 2000 BC. At first, they did not make needles from metal, but from stone. Today, people in China and other countries use acupuncture for many illnesses.
People in southern Italy invented the first false teeth in about 700 BC. They used pieces of bone, or sometimes second-hand human teeth! After that, false teeth did not change for the next 2,500 years until, in 1770, a Frenchman called Alexis Duchateau first used porcelain—a hard, white material that we still sometimes use today.
Zacharias Jansen from Holland made the first microscope in about 1590. Through it, objects appeared nine times bigger than their real size, but it did not give a very clear picture. Jansen did not use his invention very much because people at that time did not want to look at small things!
选项
答案
false teeth
解析
根据原文可知,大约在公元前700年,意大利南部的人们发明了第一颗假牙。因此,填入false teeth。
转载请注明原文地址:https://tihaiku.com/zcyy/3705973.html
相关试题推荐
What’sbeingdiscussedinthetalk?[br][originaltext]F:Well,I’msureallo
What’sbeingdiscussedinthetalk?[br][originaltext]F:Well,I’msureallo
What’sbeingdiscussedinthetalk?[originaltext]F:Well,I’msureallourlis
WhyhasMarybeenabsentfromclass?[br][originaltext]W:Annemissedclassag
WhyhasMarybeenabsentfromclass?[br][originaltext]W:Annemissedclassag
WhichofthefollowingisNOTtrue?[br][originaltext]Theweatherwascloudyt
WhichofthefollowingisNOTtrue?[br][originaltext]Theweatherwascloudyt
WhichofthefollowingisNOTtrue?[br][originaltext]Theweatherwascloudyt
WhichofthefollowingisNOTtrue?[originaltext]Theweatherwascloudytodayw
Whichofthefollowingdidthecallerhavedecorated?[br][originaltext]M:Hel
随机试题
Forpeoplesufferingfromdepression,theadviceisusuallythesame:seekh
如果模型中的解释变量存在完全的多重共线性,参数的最小二乘估计量是()A.无偏的
D提示首先画出该电路的复数电路图如解图a)所示,然后画相量图分析(见解图b),可见,由于电参数未定,各相量之间的关系不定。 注意此题可以用“排除法”完成,分
枳实的理气功效是()A.行气 B.纳气 C.疏肝 D.破气 E.降
斑蝥米炒时,每100kg药物用米的量是A.5kgB.10kgC.15kgD.20
货币就其本质而言,可分为()。A.非债务货币 B.债务货币 C.金属货币
A.活血祛瘀,通经下乳 B.散瘀止痛,续筋接骨 C.活血止痛,化瘀止血 D
中国公民张某系自由职业者。2019年1月~12月收入情况如下: (1)年初开始
下列各项中,属于企业留存收益的有()。A.按规定从净利润中提取的法定盈余公积
下列影响建设工程项目实施的风险因素中,属于经济与管理风险的是()。A.气象条件
最新回复
(
0
)