Question

几道英语，化学题。急～～～～～～～～

根据句意和英文释义写单词，使句子完整，通顺。 1.His _____(a thing that has been successful) was the result of hard work. 2.We made an _____(a plan) to meet on July 10. 3.Our math teacher has gone on a business trip,so we have more English lessons _____(in the place of sb/sth). 首字母填空 How do Americans spend their weekends when they are free from work and school？People from different f_____ have different ideas.It d_____ on the number of children in the family,their ages and the family income. Each family member is usually busy doing something differnt from the o_____ .During the weekend,the students often s_____ some time on their school work.Saturday evening is f_____ dances,plays and movies. 化学： 1.某同学在把碳酸钠粉末加入试管中后，发现在试管口附近的试管壁上也有碳酸钠粉末，写出造成这种现象的可能原因。 2.举两三个事实来说明空气中也含有水蒸气。 3.假如空气中含有较多的二氧化碳气体，请设计一种方法来确保进入这些地方的人的人生安全。

Answer 1

success
appointment
instead
families
depends
others
spend
for
1.未按规定往试管中倒药品（V型纸槽未插到试管底就倒了）
2.薯片暴露在空气中会变潮；沙漠中的仙人掌可以吸收空气中的水，虽然土地里一点水也没有，但他们还是能成活
3.用NaOH来吸收CO2