单项选择题

大连商品交易所成立于
A、1999
B、2003
C、1993
D、2009

你可能感兴趣的试题

单项选择题

Which part of the writing plan for the personal statement is inaccurate?
A、Grab your reader's attention from the very beginning.
B、Tell your personal compelling story. Bragging is allowed and necessary.
C、Tactfully explain challenges you encountered and how you have overcome them.
D、Conclude with what you intend to do upon your graduation.

不定项选择

K带吸收是由n→π*跃迁引起的吸收带，它的吸收系数一般小于100，为弱吸收带。

A．错误
B．正确