1. The university's constitution defines the powers of two governing general council， which currently retains authority over constitutional matters， consists of all the university's living twenty-member senate decides routine matters by majority vote.A new proposal suggests making a unanimous vote in the senate sufficient to change the constitution.
If the statements above are true， which of the following must follow on the basis of them?
(A) The proposal will take effect only if it receives the senate's unanimous support.
(B) Currently each member of the senate has power of veto over any proposal that comes before that body.
(C) Adopting the proposal would allow passage of constitutional changes without the general council's approval.
(D) Any of the university's alumni can fill any one of the twenty seats on the senate.
(E) Adopting the new proposal would increase the voice of the alumni in the conduct of university affairs.
arison of the growth rings of ancient trees enables scientists to determine from a piece of timber the year in which the tree used for the timber was e， by analyzing the growth rings in timber surviving from ancient buildings， archaeolo gists can determine precisely when those buildings were constructed.
Which of the following is an assumption on which the argument depends?
(A) The timber used for construction purposes in ancient times was made from very old trees.
(B) The timber that was used in ancient building construction had not， prior to being used in the construction of the buildings， lain unused for an indeterminable amount of time.
(C) The growth rings of any tree felled in a given year are identical to the growth rings of any other tree felled in that year.
(D) The oldest of the ancient buildings that survive to the present day were constructed of the most durable woods.
(E) Ancient builders did not use more than one type of wood for the construction of a given building.
参考答案：
CB