— What does your father do?
—
A:He is a teacher.
B:He is from China.
C:He is fine.
D:Thank you very much.
金砖五国目前是世界经济增长的主要聚焦点,读金砖五国分布图回答下列各题。
集合A={x|x2﹣2x≤0},B={x|y=lg(1﹣x)},则A∩B等于( )
过敏原和抗原比较的叙述中正确的是