权证与交易所交易期权的主要区别在于，交易所挂牌交易的期权是交易所制定的标准化合约。 ( )
参考答案：对
在显微镜下观察下列哪一种材料时，能在细胞内找到上图中④所示结构？
A．洋葱鳞片叶内表皮
B．人的口腔上皮
C．黄瓜表层果肉
D．洋葱根尖
Chang' e-2 was launched successfully on Oct l, 2010 _____ the hard work of scientific and
technological workers in Aeronautics. [ ]
A. in spite of
B. due to
C. along with
D. rather than
