One day, Allan and his friend Henry went swimming in a river. It was very hot. How happy they were in the river! After they got out of the water, they played games in the sun for a while.
    On their way back, Henry saw some flowers. He liked flowers very much and ran into the green field to look at them. Now Allan was walking by himself.
    Then he heard Henry calling out, "A snake（蛇）! Help!..."
    "What's wrong with you?" asked Allan.
    "A snake bit（咬）me in the leg. Come here!"
    Allan ran over and saw a small red wound（伤口）on Henry' s leg.
    "The snake was in the grass. I didn't see it."
    "Sit down quickly"! Allan told Henry.
    Allan put his mouth at the little red wound and began to suck（吸）at it. In this way he saved （挽救）Henry's life. "Oh, Allan, it's very kind of you to help me."
    "That's all right. We are friends and we must always help each other."

____ ____ ____ you?

2016年9月，财政部、国家税务总局出台政策明确科研人员在取得股权激励时可暂不缴纳个人所得税，允许递延至分红或股权转让时纳税，同时，在转让环节的一次性征税统一适用20%的税率，比原来税负降低10—20个百分点。这一举措（    ）

①说明国家在完善再分配调节机制

②体现按劳分配的基本内容和要求

③是国家对公民权利与知识的尊重

④表明税收具有无偿性固定性特点