—The South. She prefers rice to noodles.
A:how old she is
B:what she does
C:where she's from
D:who she is
我国人口的分布特点是( )
A是一种常见的单质,B,C为中学学习的常见化合物,A,B,C均含有元素X。它们有如下转化关系(部分产物及反应条件已略去):下列判断正确的是( )
如图中能正确模拟吸气时肺和膈肌活动情况的是( )