【单选题】A large number of students _____ at the English corner to practice oral English at the moment .
【简答题】(person) ______ , I prefer a foreigner to speak with to practice my oral English.
【简答题】Section A The more you practice oral English, the better you can speak it, and this is 'practice makes perfect' means.
【单选题】插入与缺失一个或一段核苷酸,可以使下游的密码子阅读框发生变化,改变自突变点至肽链的C端的所有氨基酸序列,这类突变叫()
【单选题】插入与缺失一个或一段核苷酸,可以使下游的密码子阅读框发生变化,改变自突变点至肽链C端的所有氨基酸序列,这类突变叫( )
【单选题】Judy was encouraged to practice oral English by Mr. Li. (就划线部分提问)
A.
Who was encouraged to practice oral English by Mr. Li?
B.
Who encouraged to practice oral English by Mr. Li?
C.
Who is encouraged to practice oral English by Mr. Li?
【判断题】交流接触器铁心端面嵌有短路铜环的目的是消除电弧。