在：活性炭、氦气、一氧化碳、氮气、明矾、金刚石中选择适当的物质填空
①冰箱除异味的是____ ；               ②霓虹灯中充入的是____ ；③薯片等膨化食品包装袋内的是____ ； ④煤气中的主要成分是____ ；⑤可用来切割玻璃的是____ ；      ⑥自来水厂常用的絮凝剂是____ 。

央视热播的《舌尖上的中国》第二集主食的故事表达了中国人对主食的深厚情感，以下古人类最有可能享受主食米饭的是（    ）

    When we say “Chinese spring festival”, we can think of get—together and reunion. But one very ____ (interest) thing is the people who ____ (real) want to get home quickly are here and there. We can see from TV and newspapers that the bus and railway stations are ____(crowd) with people.

    You might ask why people are ____ hurry（匆忙的） to get home. One of the main ____ (reason) is the spring festival is the most important festival for Chinese people and is the time when all family members get together, just like Christmas in the West. They can sit____ table or around TV to chat, see all ____ (kind) of programs and enjoy the fantastic performances.

    Also, it is ____ (get) more and more popular to get lucky money from the old. It is the symbol ____ good luck at the beginning of a new year. So next time, dear kids, have a ____(try).

肾脏形成尿液是连续的，但排尿是间断的，是由于膀胱有暂时贮存尿液的功能．（判断对错）