晴天中被照明对象主要接收三种光线的照明：（）（）和（）。
参考答案：太阳直射光、天光、环境反射光
There was a lot of fun at yesterday’s party. You _______, but why didn’t you?
A．should come
B．may come
C．ought to have come
D．may have come
劳动者实现权利、维护权益的重要依据是 [ ]
A．提高劳动者的职业技能
B．建立工资正常增长机制
C．依法签订劳动合同
D．自觉履行劳动者的义务
