【简答题】Listen to the dialog and choose the best answer to each question you hear.
【多选题】请选出下列有关分析性研究两种设计方法的正确叙述。
C.
队列研究时期发病率的高低,影响到随访的样本量和时间
D.
病例对照研究中,人群的暴露率影响所需的样本量
E.
从特殊职业的人群所得到的结果,不可外推到其他人群或较大的人群
【单选题】Ralph Waldo Emerson’s famous Harvard address of 1837-- “________” was regarded the intellectual American declaration of independence, which called upon an Americanized writing of American writers.
【简答题】A.In 1817. B.In 1837. C.In 1819. D.In 1897.
【单选题】Listen to the dialog 1 and choose the best answer to each question you hear.
A.
She's too busy to go to the concert.
B.
She'll go with the man soon.
C.
She prefers to go to the movies instead.
D.
She'll go with the man next time.
【简答题】Listen to the dialog and choose the best answer to each question you hear.