20世纪20年代中期， * * 国际对当时中国革命有如下的评价：“孙中山及国民党‘希望在外国人眼里以一个与义和团运动毫无共同之处的、有声望的民主主义政党的姿态出现。’”这一评价主要是基于

A．孙中山不反对西方国家的政治制度和思想

B．旧三民主义缺乏明确的反帝反封建的主张

C．辛亥革命由于缺乏坚实的群众基础而失败

D．孙中山希望通过实行政党政治来改造中国

For each blank，choose the best answer from the four choices and write down on the answer sheet．

(1) is a protocol that a host uses to inform a router when it joins or leaves an Internet multicast group．

(2) is an error detection code that most data communication networks use．

(3) is an interior gateway protocol that uses a distance vector algorithm to propagate routing information．

(4) is a transfer mode in which all types of information are organized into fixed form cells on an asynchronous or non -periodic basis over a range of media.

(5) is an identifier of a web page.

2（）

A．4B/SB

B．CRC

C．Manchester Code

D．Huffman Code