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发布时间：2006-06-22 13:26     点击：

    (A) M and Q

    (B) O and R

    (C) P and Q

    (D) P and R

    (E) R and Q

    19. R must be a female if

    (A) M and Q are siblings

    (B) O and R are siblings

    (C) P and Q are siblings

    (D) O is P's sister-in-law

    (E) O is P's brother-in-law

    20. Which of the following statements must be FALSE?

    (A) O is P's sister-in-law.

    (B) Q is P's sister-in-law.

    (C) N is P's brother-in-law.

    (D) O is P's brother-in-law.

    (E) Q is P's brother-in-law.

    21. If Q and R are married to each other, which of the following must be true?

    (A) O is a male.

    (B) R is a male.

    (C) M is a female.

    (D) N is a female.

    (E) p is a female.

    22. If P and R are brother, which of the following must be true?

    (A) M and O are siblings.

    (B) N and P are siblings.

    (C) M is a male.

    (D) O is a female.

    (E) Q is a female.

    23. Recently a number of writers have proposed that our ancestors were influenced by visits from extraterrestrial and that these visitors were the builders of such monuments as the pyramids of Egypt.

    Which of the following statements, if true, would constitute the strongest evidence in support of the proposal described above?

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