春秋时提出“国将亡,必多制”的是( )。
A.孔子
B.叔向
C.子产
D.邓析
参考答案:B
The H1N1 flu spread very quickly at the beginning, __________, many people were ill.
A.therefore
B.instead
C.in advance
D.however
论述种群调节学说。