[多项选择]在我国要充分发挥人民群众创造作用就必须 ( )
A. 从根本上改造社会制度
B. 不断完善和发展社会主义经济制度
C. 建设具有高度民主的社会主义政治制度
D. 大力提高社会生产力和科学文化水平

With Airbus’ giant A380 airliner about to take to the skies, you might think planes could not get much bigger-and you would be right. For a given design, it turns (1) , there comes a point where the wings become too heavy to generate (2) lift to carry their own weight. (3) a new way of designing and making materials could (4) that problem. Two engineers (5) University College London have devised all innovative way to customise and control the (6) of a material throughout its three-dimensional structure.
In the (7) of a wing, this would make possible a material that is dense, strong and load-bearing at one end, close to the fuselage, (8) the extremities could be made less dense, lighter and more (9) . It is like making bespoke materials, (10) you can customise the physical properties of every cubic millimetre of a structure.
The new technique combines existing technologies in a(n) (11) <
A. novel
B. strange
C. odd
D. peculiar