Наука и техника
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An airplane caught in turbulence moves both as a whole body and as a flexible structure, Pettit said: “It’s sort of mind-blowing, the number of ways an airplane can bend and twist.” To compensate for all that jouncing and twisting, the flight-control software uses the plane’s sensors to calculate the force and direction of the wind. Then it moves the flaps on the wings and tail to counteract the pressure. “Say the airplane is bending like a yardstick,” Pettit said. “The elevator”—the horizontal flap on the tail—“can move to oppose that. Or the rudder will stop it from moving side to side.” If the plane heaves up, the spoilers can press it back down. If it drops, the wing flaps can lift it up. If it starts to roll, the ailerons can right the ship.
不满300总吨的船舶，以及从事沿海作业的船舶，其赔偿责任限额由国务院交通运输主管部门制定，报国务院批准后施行。
唯物史观认为，人的实践活动推动社会基本矛盾发展，人的实践能力解决社会基本矛盾问题，人的实践目的影响社会基本矛盾轨迹，而社会基本矛盾运动的根本指向在于实现人的自由全面发展。在物质生产、精神创造和社会活动中，社会基本矛盾运动通常是以作为实践主体的人的能动性、社会性、历史性体现出来的。社会基本矛盾运动规律的客观规定性与人的主体性、实践性和能动性有机统一，推动了社会发展，创造了人类文明。在社会主义社会，社会基本矛盾的主客观有机统一性，典型地体现在以下几个方面。