their teeth with some small tree branches (树枝) 1800 years ago . People 34 a kind of toothbrushes with pig hair and bamboo. It might be the world's earliest form of toothbrushes. As time went by, the form of toothbrushes
根据第二段前两句“The first toothbrushes were actually small twigs that people would chew on one end...were then used to clean their teeth."可知,人们会咀嚼嫩枝的一端 以软化其纤维,然后用这些纤维来清洁牙齿,故 人们在用这些小嫩枝刷牙前会先咀嚼它们。 12.B细节理解题。 根据第三段中的“In1845,...
...a small town peopled by lay workers and families. 普通工人和家庭居住的小镇 柯林斯高阶英语词典 Grass's novels are peopled with outlandish characters... 格拉斯的小说里都是些稀奇古怪的人物。 柯林斯高阶英语词典 British history of the 19th century is peopled by energetic reformers... 19世纪英...
Nonetheless, with a p-value of p = 0.302, the difference in tooth brushing frequency between the age groups was not significant (Table 3). Based on the responses provided by the caregivers who help the P-EA brush their teeth, 42.3% (n = 55) of the P-EA began tooth brushing...
The flute is big at one end and small at the other. When playing, you should hold the big head in your mouth without blowing, but hum a tune with your throat. The vibration of the vocal cord drives the vibratio...
B“Brush your teeth every day," say dentists. But in Africa, some people brush their teeth all day long. They chew a small stick to brush their teeth. In Senegal(塞内加尔),people call the chewing stick “sothio” . It means “clean” in their lan-guage. In East Africa, people call...
( )1. What did people usually do with the twigs before brushing their teeth with water?A. They chewed on them.B. They cut them into two parts.C. They glued them to a handle.D. They made small holes in them. 相关知识点: 试题来源: 解析 A 题目询问人们在用水刷牙前如何使用小树枝...
16.Brush your teeth every day.dentists say.In the south of Africa.some people brush their teeth with sticks first.They keep a small stick in their mouth to chew or scrub their teeth all day.People cut the sticks from trees.They are the African tooth
Our testers found it easy to control, with many praising its good looks and compact size. Their teeth felt much cleaner after use and the majority were satisfied with its battery life. It lacks a pressure sensor, which is disappointing at this price point, and it turned off easily while...
I finally had to set the baby down. The baby’s little teeth were coming in. I looked for a smooth stick for the baby to chew on. Found one! But when I looked back, the baby was a toddler. And the ba...