①王强认为上述实验是可行的,其共同原理是____。
②李莉提出质疑,她认为上述实验不严谨,其理由是____;
要得到科学严谨的结论,仍利用该装置,补做的对比实验是____。
③你认为两实验中存在安全隐患的是____(填代号),理由是____。
④请写出二氧化碳与氢氧化钠反应的方程式:____。
It's a sunny day in the farm today. My aunt has a farm. The farm is very small. There are twelve horses, sixteen cows and fifty hens. My aunt likes tomatoes very much. So she has many tomatoes in the farm. Look! The tomatoes are red. They are very beautiful.
It's sunny in the farm today.
①情绪影响着我们的观念和行动 ②人与人之间的情绪会相互感染
③我们可以根据自己的需要表达情绪 ④我们要学会合理地调节情绪