A:代谢与遗传
B:适应性与遗传性
C:应激性和遗传性
D:应激性和适应性
吸烟对人体有害,燃着的香烟产生的烟气中含有一种能与血红蛋白结合的有毒气体,该气体是( )
用一个实际问题来解释代数式(1+15%)a的实际意义.
After a heated discussion at the meeting,a new plan came________being,which would have a great effect________the culture life of people.