【单选题】听力原文: In recent years, linguists(语言学家) and language teachers have begun to describe language according not only to grammatical structure, using traditional concepts and terms such as the imperative, b...
A.
Grammatical structure.
C.
Traditional concepts and terms.
【单选题】Could you describe the speaker’s recent activity?
A.
He’s never lonely, for he has worked in his own company.
B.
He started a business after he had gained some experience.
C.
He’s upset about his own business for three years.
D.
He needed to spend three more years working with the IT firm.
【简答题】Scientists Alan M.Goldberg and Thomas Hartung describe recent advances in replacing the use of animals in toxicology(毒物学)testing.Improvements in cell and tissue culture technologies,for example,allow ...
【单选题】醋酸在化学危险物品的分类属于()????
【简答题】Talia: Trust me, Tony. I won’t let you down. Tony: I hope not. I don’t want to _______ the story to John.
【单选题】福尔马林在化学危险物品的分类属于()。????
【单选题】According to a recent poll, 61 percent of American high school students admitted ______ cheating on exams at least once.