下列各种地表形态中,由同一种外力作用形成的是[ ]
A.瀑布、戈壁
B.沙丘、黄土沟壑
C.河流峡谷、花岗岩地貌
D.三角洲、冲积扇
答案:D
Which of the following statements does the author support
A.Specialists are more expensive to hire than generalists.
B.Formal schooling is less important than job training.
C.On-the-job training is, in the long run, less costly.
D.Generalists will outdo specialists in management.
SSSRIs较之TCA药物,前者()
A.价格低廉
B.抗抑郁疗效更好
C.副反应多而严重
D.安全性好,耐受性强
E.抗抑郁疗效差