实验过程:①打开K1、K2,通入N2,一段时间后,Ⅰ、Ⅱ试管中均无明显现象;②改通入氧气,Ⅰ中白磷燃烧而Ⅱ中白磷仍无明显现象.
— _____do you like the cakes in our shop?—They're very______. I will come here more often in the future.
乳酸(C3H6Ox)是一种重要的体内代谢物.其相对分子质量为90.求: