18 [单选题，1分] In the course of ___, some birds have lost their power of flight and started to live on land.

A. evolution

B. explosion

C. assumption

D. compensation

参考答案与解析：

相关试题

单选题I have some（）(book), and you have afew （）(pen).

单选题I have some（）(book), and you have afew （）(pen).A. books, pensB. books, penC.

  • 查看答案

    • Final-year students(1) (单选题)A.Took an exam.B.Registered for a course.C.Signed a petition.D.Started a

    Final-year students(1) (单选题)A.Took an exam.B.Registered for a course.C.Signed a

  • 查看答案

    • Final-year students(1) (单选题)A.Took an exam.B.Registered for a course.C.Signed a petition.D.Started a

    Final-year students(1) (单选题)A.Took an exam.B.Registered for a course.C.Signed a

  • 查看答案

    • 单选题 (1.6分） Over the course of the twelfth century, the feudal Kingdoms witnessed a proliferation of

    单选题 (1.6分） Over the course of the twelfth century, the feudal Kingdoms witnessed

  • 查看答案

    • （单选题，2分）------ May I have your name?（） ------______.

    （单选题，2分）------ May I have your name?（） ------______.A. Yes, pleaseB. All rightC.

  • 查看答案

    • But what about birds？Some clever birds have been seen to copy laughter and even make fun of other an

    But what about birds？Some clever birds have been seen to copy laughter and even

  • 查看答案

    • 单选题 第18题 1分 18.亚健康者是指

    单选题 第18题 1分 18.亚健康者是指A. 急、慢性病病人及损伤者B. 先天和后天性因素所致的残疾者C. 身体虚弱的老年人D. 不明原因的体力疲劳、神经衰

  • 查看答案

    • Passage(1) (单选题)Questions 16 to 18 are based on the passage you have just heard.16.A.It is mainly ba

    Passage(1) (单选题)Questions 16 to 18 are based on the passage you have just heard.

  • 查看答案

    • Questions 16 and 18 are based on the news reportyou have just heard.(1) (单选题)What does the speaker s

    Questions 16 and 18 are based on the news reportyou have just heard.(1) (单选题)Wha

  • 查看答案

    • Passage One(1) (单选题)Questions 16 to 18 are based on the passage you have just heard.A.It is mainly b

    Passage One(1) (单选题)Questions 16 to 18 are based on the passage you have just he

  • 查看答案