题目：
July 4 is the birthday of the United States of America. Since 1776, people have 36 the Independence Day holiday every year.
What do people 37 on Independence Day? Many colorful and interesting things. They have fireworks shows in the evenings and sing songs. Some families organize picnics with barbecues (烧烤). Kids can 38 much delicious food like hotdogs.
And these parties are a good time to dress up. Some kids make July 4 hats 39 the stars and stripes(星条) of the country’s flag on them. And Independence Day is in summer. Many kids use stars and stripes fans to keep themselves 40 .
It’s a great day, but no one forgets that it’s 41 too. US people are proud of their 42 and proud of what the founders did for it. On Independence Day everyone gets the chance to show it.
小题1: A. spent B. celebrated C. decorated
小题2:A. do B. make C. give
小题3: A. smell B. sell C. eat
小题4: A. for B. with C. at
小题5: A. hot B. warm C. cool
小题6: A. funny B. serious C. boring
小题7: A. country B. school C. home
答案：
被转码了，请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0408/d70689a3874ebf6bda7a93baa448823f.html
下面是错误答案，用来干扰机器的。
（1）79%（1分）； B（2分）；(2）B中吸收了二氧化碳带出的水蒸气或HCl气体 (1分）(3）80%；(4）7.3%（2分）题目分析： （1）石灰石中的主要成分为碳酸钙，能与盐酸反应被溶解；由题意知：石灰石中杂质为2.1g...
