为了满足电焊工艺的要求，交流电焊机应具有（）的外特性。

A、平直

B、陡降

C、上升

D、稍有下降

Board member: As a longtime member of the college’s board of trustees, I believe that the board has functioned well in the past because each of its members has had a broad range of experience and interests. Thus, if in the future any members are elected primarily to press for a particular policy, such as reducing tuition, the board will function leas well.
In drawing the conclusion above, the board member must have been making which of the following assumptions

A．The college will suffer financially if the board reduces tuition.

B．The college will not be able to operate if and when the board functions leas well than it does currently.

C．The board functions well because its members are primarily interested in particular academic policies rather than in financial policies such as the level of tuition.

D．In order to be elected as a member of the board, one must have a broad range of experience and interests.

E．(E) Each of the people who would be elected to the board primarily to press for a particular policy lacks a broad range of experience or interests.