小阳同学在厨房里,发现3包用相同塑料袋装着的白色粉末,询问后得知是淀粉、苏打(碳酸钠、Na2CO3)和小苏打(碳酸氢钠、NaHCO3)。为了区分它们,把3种白色粉末分别标号为A、B、C后,设计了如下探究过程:
查询资料:碳酸氢钠在加热时能分解成碳酸钠、二氧化碳和水,而碳酸钠不会分解。
—No, she isn't. She's than me.
4×3=____ 30×4=____ 8+15=____
36+5=____ 20×5=____
—Did you go to her birthday party? —I __________, but I had to work extra hours to finish my homework.