发热量的大小取决于什么?
参考答案:
发热量的大小取决于燃料中碳、氢硫元素含量的多少。
In an attempt to save money, some housewives like to go from shop to shop to search for real _______.
A comments B. champions C. bargains D. traditions
就功效而言,安宫牛黄丸擅长于()。