句意:自50年前以来,科学家们已经发现了不同的治疗方法。 考查现在完成时态。句子的时间状语“since 50 years ago”表示“自从50年前以来”,因此句子时态为现在完成时态,表示过去发生的动作,持续到现在,也许还要继续下去,其结构为”has/have+动词过去分词”,主语为复数“scientists”,故应用“have discovered”。故...
Scientists ___ different kinds of ways to treat the illness since 50 years ago.( )A.have discoveredB.discoveredC.will discoverD.discover 相关知识点: 试题来源: 解析 结合句意,自从50年前科学家__不同方法来治疗这个疾病。结合句子中后面有since+时间段,可知需要用现在完成时,用have/has done,主语...
The charts and table below show the percentage of customers choosing different kinds of websites when shopping online and the percentage of customers shopping online for different reasons in two countries in 2012. Summarise the information by selecting and reporting the main features, and make compari...
Parasitologist- A doctor that is responsible for study of parasites, their pathology and parasitic diseases and treatment of these diseases. Pathologists -Specialist scientists who are doctors that study abnormalities in living organisms and study DNA, tissue, blood and other various human and animal ...
初二英语阅读Scientists invent different kinds of robots.Some like a person,some like a snake,or even some like a big hand.People use robots in different fields.Some work in hospitals,others may work in your homes.They can help people do differe
Scientists are studying different kinds of plants. One of them is a special kind of flower. This flower is known for its beautiful colors and pleasant smell. Another plant is a tall tree that provides shade. What is the name of the plant that provides shade?
【题目】任务型阅读理解Scientists make different kinds ofrobots.People use them in different places.Some help workers in factories ;some helpdoctors and some may help mothers do thehousework in homes.Robots help people do differentthings. With the help of the robots, difficult workbecomes easier. ...
我是只有一名普通的学生从襄樊职业和专科学校! [translate] aSome scientists say if we eat different kinds of food,we will get all the vitaminsourbodiesneed. 有些科学家言,如果我们吃不同的种类食物,我们将得到所有vitaminsourbodiesneed。 [translate] ...
The history of science in the world, Marie Curie • the name of an immortal forever. The great women scientists, with their hard work and talent in physics and chemistry, have made an outstanding contribution, and therefore the only one in two different subject areas, two Nobel Prize-winnin...
我是只有一名普通的学生从襄樊职业和专科学校![translate] aSome scientists say if we eat different kinds of food,we will get all the vitaminsourbodiesneed. 有些科学家言,如果我们吃不同的种类食物,我们将得到所有vitaminsourbodiesneed。[translate]...