题目

C Today, air travel is far safer than driving a car on a busy motorway. But still there is a danger that grows every year. Airliners get larger and larger. Some airplanes can carry over 300 passengers. And the air itself becomes more and more crowded. If one large airliner struck into another in mid-air, 600 lives could be lost. From the moment an airliner takes off to the moment it lands, every movement is watched on radar screens. Air traffic controllers tell the pilot exactly when to turn, when to climb, and when to come down. The air traffic controllers around a busy airport like London-He图为物质运输方式的概念图，下列有关叙述正确的是（ ）A.需要消耗ATP的过程是①②③B.血浆中葡萄糖进入红细胞的方式是②C.③过程的运输速率在一定范围内随浓度差的增加而加快D.物质通过①所示过程进入细胞需要载体蛋白的协助