肉鸡养殖中的光照控制可采取（）和（）。
参考答案：间歇式光照；每天23小时光照，1小时黑暗
We were two hours late that day, which was due to the _________.
A．crowded traffic
B．crowded traffics
C．busy traffic
D．busy traffics
A．图书馆B．树C．碗D．突然E．安静F．腿
他经常在______看书。
rowded traffic