单摆摆长为L，若将摆长增加1m，则周期变为原来的1.5倍，则L＝_____________m。
1.5
宏观经济学的中心理论是（）。
The young soldier was ______ of running away when the enemy attacked. [ ]
A. scolded
B. charged
C. accused
D. punished
