执行如图所示的程序框图，输出的a值为（    ）

我国的河流大部分注入太平洋，其主要原因是（　　）

短文填词根据短文内容和以下提示：1)首字母提示，2)语境提示，3)汉语提示。在每个空格内填上一个适当的英语单词。所填单词要求意义正确，拼写准确。
       We are students of No. 10 Middle School. Recently we have____ (拜访) a paper factory. The paper factory is ____  to the river which gives us ____ (饮用)water. But we found that the factory was p____  waste water directly into the river. Now the water in it is very dirty. Lots of fish have  ____ . Some farmers say that some of their  ____  (羊) and cows have become____   and some have already died ____  they drank the water from the river. So we are  ____  to you to see if you can do something about this. We think the  ____ (污染) must be stopped right now. Thank you!
Yours sincerely，
Mike and John

1918年，第一次世界大战结束。当协约国战胜德国的消息传到北京，知识分子曾上街游行，欢呼“公理战胜强权”。同时在北京创刊的《每周评论》将“主张公理，反对强权”作为其办刊宗旨。对“公理”的呼喊反映出中国知识分子：（   ）